Automatic headlamp actuation, function

P82.10-4776-09

1 Rotary light switch in "AUTO" position

2 Darkness detected

3 Combination switch set to low beam or high beam On position

4 Engine speed

5 Standing lamps ON

6 Low beams On
(for code (615) Bi-xenon headlamp unit with integrated curve illumination)

7 Ignition auxiliary voltage
(for code (615) Bi-xenon headlamp unit with integrated curve illumination)

8 License plate lamp On

9 High beams On

10 Low beams On
(without code (615) Bi-xenon headlamp unit with integrated curve illumination)

11 Taillights ON

E2e1 Right high beam

E2e2 Right low beam
(without code (615) Bi-xenon headlamp unit with integrated curve illumination)

E2e10 Right bi-xenon lamp with integral ignition module
(for code (615) Bi-xenon headlamp unit with integrated curve illumination)

E2l1 Right high beam solenoid
(for code (615) Bi-xenon headlamp unit with integrated curve illumination)

E2n1 Xenon headlamp control unit (with code (615) Bi-xenon headlamp unit with integrated curve illumination)

B38/2 Rain/light sensor

E1e1 Left high beam

E1e2 Left low beam (without code (615) Bi-xenon headlamp unit with integrated curve illumination)

E1e10 Left bi-xenon lamp with integral ignition module (with code (615) Bi-xenon headlamp unit with integrated curve illumination)

E1l1 Left high beam solenoid (for code (615) Bi-xenon headlamp unit with integrated curve illumination)

E1n1 Xenon headlamp control unit (with code (615) Bi-xenon headlamp unit with integrated curve illumination)

E3e9 Left stop lamp, taillamp, parking lamp and side-marker lamp

E4e9 Right stop lamp, taillamp, parking lamp and side-marker lamp

E6/1 Front left side-marker lamp (for  and )

E6/2 Front right side-marker lamp (for  and )

E6/13 Left standing and parking lamp

E6/14 Right standing and parking lamp

E19/3 License plate lamp, left rear-end door

X58 Trailer hitch socket (13-pin) (for code (550) Trailer hitch without  and )

X58/11 Trailer hitch socket (7-pin) (for  and  with code (550) Trailer hitch)

B Controller Area Network bus, class B (interior compartment) (CAN-B)

C Controller Area Network bus, class C (engine compartment) (CAN-C)

LIN Local Interconnect Network (LIN)

E19/4 License plate lamp, right rear-end door

N3/9 CDI control unit (with diesel engine)

N3/10 ME-SFI [ME] control unit (with gasoline engine)

N10 front SAM control unit

N10/8 Rear SAM control unit

N70 Overhead control panel control unit

N72/1 Upper control panel control unit

N80 Steering column module

N93 Central gateway control unit

S1 Exterior lamp switch

S4 Combination switch

Function requirements

 Rotary light switch set to "AUTO".

 Rain/light sensor sends the "Darkness" signal

 Engine speed n > 300 rpm for t > 2 s
(for xenon lamps and high beams)

 The overhead control panel control unit reads in the status of the rain/light sensor and transmits a corresponding message to the front SAM control unit via CAN-B.

Function at start of journey (in darkness)

The standing lights are activated as of circuit 15R On.

The low beams are also activated with circuit 61 On.

It is possible then to switch on the high beams.

Function at end of journey (in darkness)

The low beams (high beams, if necessary) are deactivated when the engine is switched off. The standing lights are not switched off until the transmitter key (A8/1) is removed from the EIS [EZS] control unit.

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Actuation of exterior lights

Depending on the equipment fitted, the front SAM control unit actuates the following components:

 Standing and parking lamp

 Low beam

 High beam

 Front side-marker lamp

 Xenon headlamp supply module

 High beam solenoid

 Front side-marker lamp

The front SAM control unit forwards the switch-on request via CAN-B to the rear SAM control unit.

Depending on the equipment fitted, the rear SAM control unit actuates the following components:

 Brake lights, taillights, parking lights and side-marker lamp

 License plate lamp, rear-end door

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 Taillights for trailer
(for code (550) Trailer hitch)

 License plate lamps for trailer
(for code (550) Trailer hitch)

Function with wiper system active

The above-mentioned exterior lights are also switched on if the wiper runs for t = 20 s with a cycle period of t < 6 s (no washing or single wiping).

The exterior lights are switched off again if:

 there is no wipe cycle for t > 20 s

 circuit 15R is switched off

 the wiper system is deactivated manually

 When exiting a tunnel, at most t = 10 s of the cut-in time
(t = 20 s) elapse.