Table of Contents E70 Exterior Lighting Subject Page Introduction .5 System Overview .6 IPO - Exterior Lighting.6 System Components.10 Bi-Xenon Headlights.11 Daytime Driving Light .11 Rear Light Cluster.13 Design.13 Tail Lights.14 Side Marker Lights.14 Rear Reflectors .14 Lights Control Panel .14 Sensors .15 Ride-Height.15 Brake Pedal Switch .15 Rain/Driving Lights/Solar Sensor .15 Principles of Operation.16 Side Lights .18 Low Beam Headlight .18 High Beam .18 Automatic Driving Lights Control.19 Fog Light.20 Direction Indicator Lights.20 One-Touch Indicating.20 Hazard Warning Lights .21 In Connection with Alarm Triggered .21 Visual and Audible Indicators .21 Visual FeedbackThrough the Central Locking.21 Tail Light/License Plate Light.22 Brake Light .22 Substitute Lighting.22 Brake Force Display.22 Reversing Light .22 Initial Print Date: 10/06 Revision Date: Subject Page Rear Fog Lights.23 Parking Lights.23 Special Features .24 Bi-Xenon Headlight .24 Daytime Driving Lights .24 Welcome Light.24 Delayed Switch-Off Home Lights .25 Headlight-Range Adjustment .25 Lamp M onitoring.25 Cold M onitoring .25 Hot Monitoring .25 Visual Alarm .26 Anti-Theft Alarm System.26 Crash Telegram.26 Terminal 15 OFF .26 Emergency Operating Mode.26 Service Information.27 Lights in the Front Area.27 Lights in the Rear Area .27 3 E70 Exterior Lighting Exterior Lighting Model: E70 Production: From Start of Production ■MICTIWIS After completion of this module you will be able to • Explain the exterior lighting system 4 E70 Exterior Lighting Introduction The exterior lighting in the E70 is based on the exterior lighting system implemented in the E90. The E70 features the welcome light, making the vehicle even more customer-friendly. The exterior lighting system is switched on for approximately. 20 seconds when the vehi¬ cle is unlocked. This has the advantage of locating the vehicle more easily under unfa¬ vorable light conditions. A further feature is the daytime driving light that can be activated or deactivated via the Personal Profile. The following graphic shows where the control units responsible forthe exterior lighting are located in the E70. Control Units forthe Exterior Lighting 4 1 } , 2 ) / 3 ) - ^ $ Index Explanation Index Explanation 1 Dynamic stability control 5 Advanced crash safety management 2 Rain/driving lights/solar sensor* 6 Steering column switch cluster 3 Roof functions center 7 Car Access System 3 4 Vertical dynamics management* 8 Footwell module * Components installed depending on equipment configuration 5 E70 Exterior Lighting System Overview The input/output diagram provides a quick overview of the exterior lighting. It also shows which input or output signals are used forthe exterior lighting functions. IPO - Exterior Lighting a • 2 6 E70 Exterior Lighting Legend for IPO - Exterior Lighting Index Explanation Index Explanation D Footwell module FRM 9 Sensors, vertical dynamics management 2 Front lighting 10 Rear lighting 3 Trailer module 11 Flazard warning switch D J unction box control unit 12 Steering column switch cluster 5 Car Access System 3 13 Lights control panel 6 Identification transmitter 14 Door contact 7 Rain/driving lights/solar sensor in mirror base PT-CAN Powertrain CAN 8 Brake light switch BLS K-CAN Body CAN K-CAN signals at the footwell module In/out Information Source/sink Function In Crash signal Crash sensor >advanced crash safe¬ ty management Interior lighting ON, hazard warning lights ON, terminal 58g ON In Status, trailer module Trailer socket outlet > trailer module Trailer lighting Out Direction indi¬ cator Steering column stalk direction indi¬ cator > trailer module Direction indicator ON 7 E70 Exterior Lighting Schematic Circuit Diagram tt ■■ T -h © © © © © ^ 3 ) < 1 ) © ^ © © & © © vlV & © © © © © 8 E70 Exterior Lighting Legend for Schematic Circuit Diagram Index Explanation Index Explanation i—1 Main headlight, left 11 Rear light cluster, left in tailgate 2 Front fog light, left 12 Tail light, left 3 Frontfog light, right 13 Ride-height sensors, rear 4 M ain headlight, right 14 Lights control panel 5 Rear light cluster, right 15 Ride-height sensors, front 6 Rear light cluster, right in tailgate 16 Footwell module FRM 7 Raised brake light 17 Signals via F-CAN 8 license plate light, right F-CAN Chassis CAN 9 Filter with rejector circuit, raised brake light K-CAN Body CAN 10 license plate light, left KL 30 Terminal 30 K-CAN signals at the footwell module In/out Information Source/sink Function In Crash signal Crash sensor > advanced crash safety management Interior lighting ON, hazard warning lights ON, terminal 58g ON In Status, trailer module Trailer socket outlet > trailer module Trailer lighting Out Direction indicator Steering column stalk direction indicator > trailer module Direction indicator ON F-CAN signals at the footwell module In/out Information Source/sink Function In Vehicle Ride Height Sensor, vertical dynamics management > footwell module Adaptation of headlight range The range of the headlights is adapted dynamically to the respective vehicle statuses based on the signals from the ride-height sensors. The vehicle statuses include, for example, braking or accelerating as well as various load conditions. On vehicles equipped with vertical dynamics management, the footwell module receives the ride-height information via the F-CAN. 9 E70 Exterior Lighting System Components The following system components are installed forthe exterior lighting: • Control units - The footwell module contains the complete functionality to control and monitor the exterior lighting. - Roof functions center with integrated ultrasonic interior protection (motion sensor) Providing signal, e.g. forvisual alarm or visual feedback of Anti-theft alarm system - Car Access System 3 providing signal, e.g. forvisual feedback of central locking system - Advanced crash safety management providing signal, e.g. triggered by crash • Headlights - Low beam/high beam headlights - Fog lights • Direction indicator lights • Direction indicator light repeaters • Rear light clusters in vehicle body and tailgate - Tail light - Brake light - Rearfog light - Reversing light - Direction indicator lights • Lights control panel • Steering column switch cluster - Steering column stalk, high beam/headlightflasher - Steering column stalk, direction indicator lights - Steering column stalk, wiper with button for automatic driving lights control • Sensors • Center-lock button 10 E70 Exterior Lighting Bi-Xenon Headlights Index Explanation 1 Side Light/Daytime Driving Light 2 Side Light 3 Low bean/high beam/headlight flasher 4 Direction indicator light Daytime Driving Light The daytime driving light is produced bythe inner and outercorona ring.The innercham- berofthe bi-xenon headlight is used forthe daytime driving light. The inner corona ring is illuminated from behind. The reflector is designed to ensure that the light mainly illuminates the corona ring. There is a darkened shutter in the middle of the corona ring that blanks off the forward light from the reflector. Lightfrom the same headlight chamber is coupled in two fiber optics cables and fed to the outercorona ring. The outercorona ring functions as a light guide. The inner corona ring is brighterthan the outercorona ring in daytime driving lights mode. 11 E70 Exterior Lighting The footwell module decreases the daytime driving lights as soon as the side lights or low beam lights are switched on. Consequently, both corona rings of the daytime driving light are now used forthe side lights. Index Explanation 1 Side Light Ring 2 Light Guide 3 Side Light Ring 4 Bulb 5 Cover 12 E70 Exterior Lighting Rear Light Cluster Design The rear light cluster of the E70 is based on a split design. One part is integrated in the body and the other in the uppertailgate.The two parts form the complete rear light clus¬ ter. The rear light in the body section has four chambers. Almost every chamber, with the exception of the tail light LED, is equipped with a 21 W bulb. The following chambers are equipped with a 16 W bulb. • Reversing lights 16 W • Brake force display 16 W • Brake light chamber 2 Index Explanation Index Explanation 1 Tail Light 5 Brake Light 2 Brake Light 6 Tail Light 3 Direction Indicator Light 7 Brake Force Display 4 Reversing Light The rear light in the tailgate has 2 chambers. One chamber is forthe rearfog light while the other chamber is used forthe tail light. The direction indicator light is red. The light cover is also red. The direction indicator light cover for versions outside the US is light red. The orange colorforthe direction indicator light is achieved by means of a light filter. 13 E70 Exterior Lighting Tail Lights The tail lights of the E 70 are equipped with LEDs. The light from 4 LEDs is routed through fiber optics conductors. The fiber optics conductors distribute the light uniformly. Side Marker Lights The US version of the E70 has reflecting side marker lights at the front. They are located in the side apron. The reflective side marker lights at the rear are integrated in the tail light clusters in the US version. The active side marker lights in the US version is generated by the dimmed front direc¬ tion indicator lights. Rear Reflectors The rear reflectors are located in the bumper. Lights Control Panel The lights control panel features following controls as standard: • Light switch for side lights and low beam • Manual headlight-range adjustment The light control panel contains additional controls corresponding to the scope of option¬ al extras. The additional controls are: • Automatic driving lights control • Fog light button • Head-up display button 14 E70 Exterior Lighting Sensors Ride-Height One ride-height sensor is mounted on both the front and the rear axle. The signals of the ride-height sensors are used forthe headlight-range adjustment LWR.The footwell mod¬ ule directly evaluates the ride-height sensors. Note: If the vehicle is equipped with vertical dynamics management, the footwell module receives the information forthe headlight range adjust¬ ment via the F-CAN. Brake Pedal Switch The signal of the brake pedal switch is used forthe headlight-range adjustment (LWR). The Car Access System 3 supplies the voltage forthe brake pedal switch. Rain/Driving Lights/Solar Sensor The rain/driving lights/solar sensor provides the signal for switching on the driving lights as from a defined light level. 15 E70 Exterior Lighting Principles of Operation The functions of the exterior light system are integrated in thefootwell module. These lighting functions are: • Side lights • Low beam headlight • High beam - Headlight flasher • Fog light • Direction indicator light - Hazard warning light • Tail light/license plate light • Brake light - Brake force display • Reversing light • Rearfog light (Europe version only) • Parking light • Welcome light • Daytime driving light With the exception of the raised brake light, the footwell module supplies all light func¬ tions with a pulse width-modulated signal. This ensures a constant brightness level of the exterior lighting. Note: The LEDs (e.g. raised brake lightortail light)the bi-xenon headlightare not controlled but rather activated at 100% pulse width. 16 E70 Exterior Lighting In addition to the standard light functions, further special functions for the exterior lighting are integrated in the footwell module: • Bi-xenon headlight • Headlight-range adjustment • Lamp monitoring - Cold monitoring with lights "OFF" - Hot monitoring with lights "ON" • Delayed switch-off home lights • Daytime driving lights • Visual alarm - Anti-theft alarm system - Crash telegram • Special case at "terminal 15 OFF" • Emergency operating mode • Adaptive headlight Note: The adaptive headlight is described in the Product Information "Adaptive headlights E70".The description ofthe adaptive headlights includes the turn-off light. The exterior lighting system is switched on via the light switch. Example ofthe lights control panel in the E70 1 1) Index Explanation 1 Fog lights 2 Head-up display button 3 Light switch 4 Dimmer, instrument lighting 17 E70 Exterior Lighting Side Lights The light switch in the light control unit must be turned to switch position 1 to switch on the side lights. The following lamps are activated together with switching on the side lights: • Corona rings on halogen headlight • Daytime driving light corona rings, dimmed on bi-xenon headlight • Tail lights • Left/right license plate light • Terminal 58 switched Low Beam Headlight To switch on the low beam headlights, the light switch in the lights control panel must be turned to low beam headlight (switch position 2). The following lights are activated when the low beam headlights are switched on. • Bi-xenon lamp on bi-xenon headlamp After turning off the engine, the side lights stay on although the light switch is in switch position 2. The side lights are switched off automatically as the driver's door is opened. Note: Leaving the side light switched on can drain the vehicle battery. High Beam The high beam headlight is switched on underfollowing conditions: • Terminal 15 ON and • Light switch in low beam position and • Steering column switch for high beam ON The headlight flasher in connection with halogen headlights is activated by pulling on the steering column stalk. The function is operative as from terminal 30 ON. Note: The headlightflasherfunction is now also possible in connection with bi-xenon headlights. The previously separate high beam lamp in the bi-xenon headlamp is therefore no longer required. 18 E70 Exterior Lighting Automatic Driving Lights Control The following conditions must apply forthe driving lights (low beam) to be switched on: • Light switch in automatic driving light control position and • Status "Terminal 15 ON" and • Rain/driving lights/solar sensor signals darkness The footwell module switches on the low beam light if the signal from the rain/driving lights/solar sensorfails due to a defect. The low beam lights are switched on together with the side lights by the automatic dri¬ ving lights control system as soon as the rain/driving lights/solar sensor detects a certain level of ambient brightness. The signal is sent from the rain/driving lights/solar sensor via the LIN-bus to the roof functions center. The roof functions center routes the signal via the K-CAN to the footwell module. In turn, the footwell module evaluates the signal and switches on the driving lights. The driving lights switched on by the automatic driving lights control system can be switched off with the light switch or by means of the rain/driving lights/solar sensor. The side lights can also remain on after "Terminal R OFF" because they were switched on by the automatic driving lights control function. The side lights are switched off auto¬ matically after opening the driver's door. If a different door is used to exit the vehicle, the side lights will be switched off when the vehicle is locked. Note: The rain/driving lights/solar sensor now also contains the solar sensor. It performs the solarsensorfunction forthe air conditioning system. A detailed description of the rain/driving lights/solar sensorcan be found in the Product Information "Wiper/Washer System E70". 19 E70 Exterior Lighting Fog Light Switching fog lights ON/OFF The fog lights can be switched on underfollowing conditions: • Terminal 15 ON and • Light switch in side lights or low beam light ON or automatic driving lights control position and • Fog light button pressed The fog lights are switched off by pressing the button again. When switched on, the fog lights can also be switched off by turning the light switch to the "Lights OFF" position. The fog lights can be switched on again when the light switch is set to the side lights, low beam or automatic driving lights control position. Direction Indicator Lights The front and rear direction indicator light as well as the side direction indicator repeaters can be switched on as from terminal RON. They are operated by means of the switch on the steering column switch cluster. The steering column switch is an optical switch. An exact description of the steering column stalk can be found in the Product Information "Steering column switch cluster E70". A defective lamp bulb in the front or rear direction indicator lights causes the remaining direction indicator lights to flash at double the rate. A defective lamp bulb in the front direction indicator repeaters has no influence on the flashing rate of the direction indicator lights. The side direction indicator repeaters are equipped with LEDs (Light Emitting Diodes). The complete direction indicator repeater must be replaced if defective. One-Touch Indicating The direction indicator lights are activated three times in connection with one-touch indi¬ cating. In the personal profile it is possible to reduce the one-touch indicating function to flash once byway of coding. 20 E70 Exterior Lighting Hazard Warning Lights The hazard warning lights are switched on by pressing the hazard warning switch. As a result, all direction indicator lights are activated simultaneously and the indicator in the hazard warning switch flashes in time. The steering column switch has priority if it is moved in left or right direction while the hazard warning lights are active. The hazard warning function resumes afterterminal R OFF or cancelling the direction indicator. The hazard warning lights have priority when the direction indicator lights forturning left or right are switched on and the hazard warning switch is pressed. i Index Explanation 1 Hazard Warning Switch In Connection with Alarm Triggered Thefootwell module receives the request forthe hazard warning lights via the K-CAN. The signal is sent by the ultrasonic passenger compartment protection system. The alarm time forthe hazard warning lights is 6 minutes provided the Anti-theft alarm system is not switched off. The hazard warning light switch is blanked out during the alarm and therefore does not flash together with the lights. Note: The ultrasonic passenger compartment sensor is completely integrated in the roof functions center, both in terms of hardware and software. Visual and Audible Indicators The instrument cluster provides visual and audible indication of the turn signals. The footwell module informs the instrument cluster via the K-CAN to activate the acoustic generator and the indicator lights together with the direction indicator lights. The visual/audible indicator in the instrument cluster switches off if the vehicle is locked with the central locking while the hazard warning light function is active. Visual FeedbackThrough the Central Locking The visual feedback is set at the factory. The direction indicator lights flash when the cen¬ tral locking is activated. The Car Access System 3 makes available the signal necessary forthis purpose via the K-CAN. The visual feedback can be deactivated in the personal profile. 21 E70 Exterior Lighting Tail Light/License Plate Light As from terminal 30, the light switch can be used to switch on the tail lights together with the license plate lights. The lamp bulbs in the brake light chambers are used as a substitute function forthe tail light. The 21 W lamp bulbs are dimmed by means of a PWM signal forthe substitute tail light function. Brake operation has priority overthe substitute function. Brake Light As from "Terminal RON", the brake lights can be switched on by activating the brake light switch. The Car Access System 3 powers the brake light switch with a 5 V voltage. Substitute Lighting The brake force display (two-stage brake light) assumes the substitute function forthe outer brake light. Note: Both chambers are used forthe brake light in the US version. No substitute function is provided in the event of the bulb failing. Brake Force Display The brake force display is fitted on standard on the E70. The following conditions must be met for operation of the brake force display: • Driving speed > 5 km/h • Brake deceleration above 5 m/s 2 • Control intervention of the antilock braking system Reversing Light The reversing light can be switched on as from "Terminal 15 ON". The footwell module receives the signal via the K-CAN.The electronic transmission control unit makes avail¬ able this signal. On manual transmission vehicles, the footwell module receives the signal from the reverse gear switch. When the vehicle is in trailertowing mode, the reversing light of the trailer is additionally activated via the trailer module. 22 E70 Exterior Lighting Rear Fog Lights As from "Terminal 15 ON", the button forthe rearfog lights can be pressed to switch on the rearfog lights. The following conditions must apply forthis purpose: • Terminal 15 ON and • Low beam headlight ON orfog lights ON and • Button for rearfog lights pressed. The fog lights are switched off by pressing the button again. When switched on, the rearfog lights can also be switched off by turning the light switch to the "Lights OFF" position. Note: The rearfog lights are not switched on in trailer towing mode. Parking Lights The parking lights are switched on with the steering column switch as from "Terminal R OFF" and detected by the footwell module via the K-CAN. Forthe parking lightfunction, the footwell module activates the front side light and the tail light in the lower chamber of the rear light cluster. The steering column switch forthe parking lights responds with a slight delay when switched. This prevents the parking lights being switched on by mistake, e.g. by knocking against the steering column switch while getting out of the car. 23 E70 Exterior Lighting Special Features Bi-Xenon Headlight In connection with the bi-xenon headlights, the shutterforthe low beam light is activated by the "high beam ON" signal thus enabling the high beam light. High beam is also used forthe headlight flasherfunction so that the additional halogen headlight (as previously installed) is no longer necessary. The free chamber in the headlight is used forthe daytime driving light. The daytime dri¬ ving light is produced by the inner and outer corona ring. Daytime Driving Lights The light switch must be in position "0" in orderto activate the daytime driving lights. If the vehicle is equipped with the automatic driving lights control option, the daytime dri¬ ving lights are also switched on when the light switch is set to position "A". The daytime driving lights function is country specific and is activated as from "Terminal 15 ON". The daytime driving lights can be deactivated/activated via the personal profile. After "Terminal R OFF", the daytime driving lights are only switched off after the driver's door has been opened. If the vehicle is exited through another door, the daytime driving lights are switched off when the vehicle is locked. Note: The daytime driving lights cannot be deactivated in the personal profile in the US version. Welcome Light The light switch must not be in position "0" or "1" in orderto activate the welcome light. Furthermore, the parking lights or side lights must also not be activated.The welcome light is switched on as soon as the vehicle is unlocked. Forthis purpose, the Car Access System 3 makes available the status of the central locking system via the K-CAN. Thefootwell module receives the "Unlock vehicle" status and switches on the exterior lighting for approximately. 20 seconds. The ON time can be set to up to 60 seconds via the personal profile. While switched on, the welcome light can be deactivated with the "Terminal RON" status. The following light units are activated: • Tail lights • Corona rings • Side markers • Interior lighting • Courtesy lighting 24 E70 Exterior Lighting Delayed Switch-Off Home Lights The E70 is equipped with the delayed switch off home lights as standard. The lights can be switched on via the steering column switch for high beam as from lights OFF. The switch-on time is set at the factory to 40 s and can be set between 0 and 240 s in the "Personal Profile". The low beam, side lights and tail lights are switched on when the home lights function is active. Headlight- Range Adjustment The E70 is equipped with a manual headlight range adjustment system as standard. To comply with legal requirements, a dynamic headlight-range adjustment system is installed in connection with the bi-xenon headlights option. The dynamic headlight range adjustment ensures that the oncoming traffic is not dazzled. Lamp Monitoring Thefootwell monitors all lamps of the exterior lighting system both when switched on and when switched off.The monitoring function starts as from "Terminal 15 ON". Cold Monitoring Cold monitoring is based on measuring the current of the individual lamp outputs. The current pulse used for measurement purposes is so short that the lamps are not illumi¬ nated. The footwell module evaluates the individual lamp outputs to establish whether there is a line break ora lamp bulb is defective. The number of current pulses is increased significantly during the first 4 s after "Terminal 15 ON", to check whether the lamps are in working order before setting off. This function is referred to as the pre-drive check. The number of pulses is then reduced afterthe pre-drive check. Power is then applied to the lamps every 1.5 minutes. The raised brake light and tail lights are not included in the cold monitoring function. The LEDs of the brake lights ortail lights react too fast to the current pulse and would conse¬ quently light up. This also applies to the rear direction indicator lights as the side direction indicator repeaters are connected together with the rear direction indicator lights. The bi-xenon headlight is also not included in the cold monitoring. Legal regulations pro¬ hibit the current pulse to the bi-xenon headlight. Hot Monitoring Hot monitoring is based on measuring the current of the individual lamp outputs. The lamp current is used to detect an overload or interruption (break). 25 E70 Exterior Lighting Visual Alarm Anti-Theft Alarm System The footwell module enables the Anti-theft alarm system to triggerthe visual alarm via the direction indicator lights. The Anti-theft system receives the signal forthe visual alarm via the K-CAN. A detailed description can be found in the Product Information "Anti-theft Alarm System E70". Crash Telegram The footwell module switches on the hazard warning lights and the interior lighting when the advanced crash safety management sends a crash telegram. The hazard warning lights can be switched off with the hazard warning light switch. The light in the hazard warning light switch is switched off by pressing the light switch to "Lights OFF" position or by means of the rocker switch on the steering column stalk. Terminal 15 OFF The exterior lighting is switched off if "Terminal 15 ON" fails during vehicle operation or terminal 15 is inadvertently deactivated by pressing the START-STOP button. The low beam headlight remains switched on in orderto maintain road safety in this situ¬ ation. When the vehicle speed drops below 20 km/h, the low beam light is also switched off after a delay of approximately 30 seconds. Emergency Operating Mode Emergency operating mode is assumed if a defect occurs in the software of the footwell module causing failure of the entire exterior lighting system. In this case, the tail lights and the raised brake light are activated.This function is active as from "Terminal 15 ON". 26 E70 Exterior Lighting Service Information Lights in the Front Area The headlights are accessible through the engine compartment. The headlights are fit¬ ted with a service cover. The light source can be replaced after removing the service cover. The fog lights are accessible from the outside through the ventilation openings. The bulbs forthe fog lights can be replaced after removing the ventilation grille. Lights in the Rear Area The lights in the rear area are accessible through the opened tailgate. It is necessary to remove the service cover in the trim panel of the tailgate. The bulbs can then be replaced. The lamps in the body section can be accessed by removing the cover. Index Explanation 1 Access from Luggage Compartment 2 Access from Tailgate 27 E70 Exterior Lighting