Component description for Xenon headlamp control unit - GF82.10-P-2114LE

MODEL 216.3 as of model year 2009

/YoM 08

MODEL 221.0/1 up to 31.5.09

with CODE (615) Bi-xenon headlamp unit with integrated curve illumination

with CODE (616) Bi-xenon headlamp unit with integrated asymmetric curve illumination as of model year 2009

/YoM 08

MODEL 221.0/1 as of model year 2010

/YoM 09 model refinement package

Shown on model 221.0 up to 31.5.09

Fig 1: Identifying Front Headlamp Units And Xenon Headlamp Control Units

Courtesy of MERCEDES-BENZ USA

Location

One Xenon headlamp control unit is located on the underside of the left front lamp unit and the underside of the right front lamp unit respectively. The xenon headlamp control units are screwed to the housings of the front lamp units. The xenon headlamp control units are connected to the vehicle-side wiring harness via the front lamp units.

Shown on model 221.0 as of 1.6.09

Fig 2: Identifying Xenon Headlamp Control Unit Components

Courtesy of MERCEDES-BENZ USA

Location

Task

The xenon headlamp control units work in a master/slave combination and communicate with each other via the front end CAN (CAN-G). As master the xenon headlamp control unit at the left front lamp unit synchronizes the xenon headlamp control unit at the right front lamp unit.

The master and slave function assignment is done by the connector assignment or the pin coding.

The xenon headlamp control units have the following tasks:

Reading in of sensors, pickups and signals
Evaluation of input factors
Control of functions
Actuation of components

Reading in of sensors, pickups and signals

The input factors are read in via the following connection:

Front end CAN

The xenon headlamp control units use the front end CAN. The signals of the sensors listed below are sent to the xenon headlamp control unit on the left front lamp unit for calculating the vehicle speed and vehicle level:

From the ESP control unit (N47-5) (except model 221.095/195 or from the regenerative braking system control unit (N30/6) (with model 221.095/195):
- Left front RPM sensor (L6/1)
- Right front RPM sensor (L6/2)
- Left rear RPM sensor (L6/3)
- Right rear RPM sensor (L6/4)
From AIRmatic with ADS control unit (N51)
(Model 221 without code (487) Active Body Control (ABC), model 216.3 with code (489) AIRmatic (air suspension with continuous adjustment damping))
- Left front level sensor (B22/8)
- Right front level sensor (B22/9)
- Rear axle level sensor (B22/3)
From ABC control unit (N51/2)

(Model 221 with code (487) Active Body Control (ABC), model 216.3 without code (489) AIRmatic (air suspension with continuous adjustment damping))

Left front level sensor
Right front level sensor
Left rear level sensor (B22/7)
Right rear level sensor (B22/10)

Evaluation of input factors

The input factors read in via the front end CAN are evaluated by the integrated microprocessor whereupon the corresponding components are then actuated.

Control of functions

The following functions are realized by actuating the appropriate components:

Low beam
Main beam
Automatic headlamp range adjustment (HRA [LWR])
Cornering illumination (with code (619) Cornering illumination)
Dynamic curve illumination (model 216, model 221 up to 31.5.09,

model 221 as of 1.6.09 with code (615) Bi-xenon headlamp unit with integrated curve illumination or code (616) Bi-xenon headlamp unit with integrated asymmetrical curve illumination or code (621) Intelligent Light System (left-hand traffic) or code (622) Intelligent Light System (right-hand traffic))

Active light distribution

(Model 216 with code (621) Intelligent Light System (left-hand traffic) or code (622) Intelligent Light System (right-hand traffic), model 221 as of 1.6.09 with code (621) Intelligent Light System (left-hand traffic) or code (622) Intelligent Light System (right-hand traffic))

Actuation of components

Components are actuated via the following lines:

Direct line
Local Interconnect Network (LIN) (with model 216 as of 1.12.10, model 221 as of 1.6.09 with code (615) Bi-xenon headlamp unit with integrated curve illumination or code (616) Bi-xenon headlamp unit with integrated asymmetrical curve illumination or with code (621) Intelligent Light System (left-hand traffic) or code (622) Intelligent Light System (right-hand traffic))

Direct line

The xenon headlamp control unit on the left front lamp unit actuates the following components over a direct line:

Left bi-xenon light with integrated ignition module (E1e10)
Left high beam solenoid (E1I1)
(Model 216 up to 31.8.10, model 221 up to 31.5.09, model 221 as of 1.6.09 without code (615) Bi-xenon headlamp unit with integrated curve illumination and without code (616) Bi-xenon headlamp unit with integrated asymmetrical curve illumination and without code (621) Intelligent Light System (left-hand traffic) and without code (622) Intelligent Light System (right-hand traffic))
Left high beam solenoid/motorway spotlight (E1I2)
(model 216 up to 31.8.10 without code (610) Night View Assist)
Left headlamp range adjustment motor (E1m1)
Left dynamic curve illumination motor (E1m2)
(Model 221 with code (615) Bi-xenon headlamp unit with integrated curve illumination or code (616) Bi-xenon headlamp unit with integrated asymmetrical curve illumination or as of 1.6.09 with code (621) Intelligent Light System (left-hand traffic) or code (622) Intelligent Light System (right-hand traffic), model 216)
Left light distribution actuator motor (E1m3)

(model 216 as of 1.9.10, model 221 as of 1.6.09 with code (615) Bi-xenon headlamp unit with integrated curve illumination or code (616) Bi-xenon headlamp unit with integrated asymmetrical curve illumination or code (621) Intelligent Light System (left-hand traffic) or code (622) Intelligent Light System (right-hand traffic))

The xenon headlamp control unit on the right front lamp unit actuates the following components over a direct line:

Bi-xenon light with integrated ignition module (E2e10)
Right high beam solenoid (E2I1)
(Model 216 up to 31.8.10, model 221 up to 31.5.09, model 221 as of 1.6.09 without code (615) Bi-xenon headlamp unit with integrated curve illumination and without code (616) Bi-xenon headlamp unit with integrated asymmetrical curve illumination and without code (621) Intelligent Light System (left-hand traffic) and without code (622) Intelligent Light System (right-hand traffic))
Right high beam solenoid/motorway spotlight (E2I2)
(with model 216 up to 31.8.10 without code (610) Night View Assist)
Right light distribution actuator motor (E2m3)

LIN

The xenon headlamp control unit on the left front lamp unit actuates the following components over the LIN:

Left voltage converter for turn signal and cornering lights for output of cornering lights function
Right headlamp range adjustment motor (E2m1)
Right dynamic curve illumination motor (E2m2) (Model 221 with code (615) Bi-xenon headlamp unit with integrated curve illumination or code (616) Bi-xenon headlamp unit with integrated asymmetrical curve illumination or as of 1.6.09 with code (621) Intelligent Light System (left-hand traffic) or code (622) Intelligent Light System (right-hand traffic), model 216)

The xenon headlamp control unit on the right front lamp unit actuates the following components over the LIN:

Right voltage converter for turn signal and cornering lights for output of cornering lights function

	Exterior lights wiring diagram	Model 216, left headlight unit	PE82.10-P-2000-97CAA
		Model 216, right headlight unit	PE82.10-P-2000-97CAB