Front LED matrix lamp unit control unit, component description - GF82.10-P-2025FQ

MODEL 218 as of model year 2015 with CODE 640 (Full LED USA incl. ACTIVE MULTIBEAM LED)

MODEL 218 as of model year 2015 with CODE 641 (Full LED headlamps incl. ILS and ACTIVE MULTIBEAM LED (USP!) incl. new lamp design, dynamic LED for left-hand traffic)

MODEL 218 as of model year 2015 with CODE 642 (Full LED headlamps incl. ILS and ACTIVE MULTIBEAM LED (USP!) incl. new lamp design, dynamic LED for right-hand traffic)

Shown on left front lamp unit (E1)

Fig 1: Identifying Front LED Matrix Lamp Unit Control Unit Components

Courtesy of MERCEDES-BENZ USA

Location

One front LED matrix lamp unit control unit is located on the rear of the left front lamp unit and on the rear of the right front lamp unit.

The front LED matrix lamp unit control units are tightly screwed to the housing of the respective front lamp unit. The front LED matrix lamp unit control units are connected to the vehicle-side wiring harness via the front lamp units.

Task

The front lamp units are equipped with a new "multibeam technology". The light sources for implementing the high beams function are equipped with 24 LEDs that can be actuated independently of each other. The formation and intensity of the light cone can be influenced depending on which LEDs are actuated.

The left front LED matrix lamp unit control unit controls the light distribution of the left front adaptive high beam (E1e24). The right front LED matrix lamp unit control unit controls the light distribution of the right front adaptive high beam (E2e24).

The left front LED matrix lamp unit control unit also controls the power supply for the left low beam (short range) (E1e15) and the left low beam (long range) (E1e16). The right front LED matrix lamp unit control unit controls the power supply for the right low beam (short range) (E2e15) and the right low beam (long range) (E2e16).

The following tasks result for the front LED matrix lamp unit control units:

Reading in of sensors and signals
Evaluation of input factors
Controlling functions
Actuation of components
Transmitting signals

Reading in of sensors and signals

The input factors are read in via the following connections:

Direct line
Chassis CAN 2 (CAN E2)

Direct line

The left front LED matrix lamp unit control unit directly reads in the signals of the temperature sensors in the left front lamp unit.

The right front LED matrix lamp unit control unit directly reads in the signals of the temperature sensors in the right front lamp unit.

Chassis CAN 2

The front LED matrix lamp unit control units read in various status information and requests via the chassis CAN 2. This includes the following:

Terminal status of terminal 15
"Switch on low beams" request
"Switch on high beams" request
Object information, Adaptive Highbeam Assist
Status of intelligent headlamp control (Intelligent Light System)
"Light distribution" request, intelligent headlamp control (Intelligent Light System)
Request to switch on the fan motor 2 for the left front lamp unit (E1m5) or the fan motor 2 for the right front lamp unit (E2m5) The functions that use these signals are described in the individual function descriptions (see block diagram or function schematic).

Evaluation of input factors

The input factors that have been read in are evaluated by the integrated microprocessor and the relevant components are then actuated.

Controlling functions

The front LED matrix lamp unit control units control the following functions:

Low beam
High beam
Thermal management (temperature monitoring and fan control)
The front lamp units have temperature sensors that are used to sense the heat development in the areas actuated by the LED. The front LED matrix lamp unit control units evaluate the signals of three temperature sensors each. If the LEDs or plastic housing of the front lamp units threaten to overheat as a consequence of high outside temperatures or high actuation currents, the front LED matrix lamp unit control units reduce the actuation currents of the LEDs and thereby lower the heat development. In addition, the front lamp units are ventilated. The active ventilation is also used simultaneously for defrosting or deicing at low outside temperatures.

Actuation of components

The left front LED matrix lamp unit control unit actuates the following components via direct lines:

Left low beam (short range)
Left low beam (long range)
Left front adaptive high beam
Left front lamp unit fan motor 2

The right front LED matrix lamp unit control unit actuates the following components via direct lines:

Right low beam (short range)
Right low beam (long range)
Right front adaptive high beam
Right front lamp unit fan motor 2

Transmitting signals

The front LED matrix lamp unit control units send status information on the low beams and high beams via the chassis CAN 2 to the front SAM control unit with fuse and relay module (N10/1) as the exterior lights master control unit.

Exterior lights wiring diagram	MODEL 218 as of model year 2015 with CODE 640 (Full LED USA incl. ACTIVE MULTIBEAM LED) Left front lamp unit, E1MODEL 218 as of model year 2015 with CODE 641 (Full LED headlamps incl. ILS and ACTIVE MULTIBEAM LED (USP!) incl. new lamp design, dynamic LED for left-hand traffic) Left front lamp unit, E1MODEL 218 as of model year 2015 with CODE 642 (Full LED headlamps incl. ILS and ACTIVE MULTIBEAM LED (USP!) incl. new lamp design, dynamic LED for right-hand traffic) Left front lamp unit, E1	PE82.10-P-2000-97XAD
Exterior lights wiring diagram	MODEL 218 as of model year 2015 with CODE 640 (Full LED USA incl. ACTIVE MULTIBEAM LED) Right front lamp unit, E2MODEL 218 as of model year 2015 with CODE 641 (Full LED headlamps incl. ILS and ACTIVE MULTIBEAM LED (USP!) incl. new lamp design, dynamic LED for left-hand traffic) Right front lamp unit, E2MODEL 218 as of model year 2015 with CODE 642 (Full LED headlamps incl. ILS and ACTIVE MULTIBEAM LED (USP!) incl. new lamp design, dynamic LED for right-hand traffic) Right front lamp unit, E2	PE82.10-P-2000-97XAE