Parking Lamp: Description and Operation

GF82.10-P-3060LE Standing/Parking Lights Actuation, Function

Function requirements, standing/parking lights actuation, general
^ No overvoltage or undervoltage
(operating voltage range U ≥7 ≤17.5 V)

Standing/parking lights, general
The standing/parking lights actuation serves to mark the parked vehicle in darkness.

The standing/parking lights actuation is comprised of the following subfunctions.
^ Standing lights actuation function sequence
^ Lights on reminder function sequence
^ Parking lights actuation function sequence

On 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 asymmetric curve illumination or code (621) Intelligent Light System (left-hand traffic) or code (622) Intelligent Light System (right-hand traffic) light emitting diodes (LEDs) are used for output of the parking light and standing light functions instead of conventional incandescent bulbs. For this purpose, the left turn signal and cornering light voltage converter (E1n5) is located below the left front lamp unit (E1) and the right standing and parking light voltage converter (E2n5) below the right front lamp unit (E2).

These are supplied with power by the front SAM control unit with fuse and relay module (N10/1) and control the left standing light and parking light (E1e3) in the left front light unit and right standing light and parking light (E2e3) in the right front lamp unit. LEDs are also used instead of conventional incandescent bulbs for output of the flashing functions. For this purpose, the left turn signal and cornering light voltage converter (E1n6) and the right turn signal and cornering light voltage converter (E2n6) are located below the front lamp units. These are supplied with power by the front SAM control unit with fuse and relay module and control the left turn signal light (E1e5) in the left front light unit and right turn signal light (E2e5) in the right front lamp unit.

When the standing light control is active and the turn signal light actuation is requested, the front SAM control unit interrupts actuation of the LEDs located horizontally. The LEDs arranged vertically continue to be actuated.

Standing lights actuation function sequence
Turning the rotary light switch (S1) to the standing lights position request actuation of the standing lights.
The upper control panel control unit (N72/1) reads in the status of the rotary light switch via the instrument panel LIN (LIN 1) and transmits it via the interior CAN (CAN B) to the front SAM control unit. The front SAM control unit generates the request to "Switch on the standing lights" and send it, via the interior CAN, to the rear SAM control unit with fuse and relay module (N10/2) and on vehicles with code (550) Trailer hitch to the trailer recognition control unit (N28/1).

The front SAM control unit actuates the following components:
- Left standing and parking lamp
- Right standing and parking lamp
- In addition, with code (494) USA version:
- Left front side-marker lamp (United States Of America E6/1)
- Right front side-marker lamp (United States Of America E6/2)

The rear SAM control unit actuates the following components:
- Left brake light, taillight and parking light (E3e9)
- Right brake light, taillight and parking light (E4e9)
- Left license plate lamp (E19/1)
- Right license plate lamp (E19/2)
- In addition, with code (494) USA version:
- Left rear side-marker lamp (United States Of America) (E3e6)
- Right rear right rear side-marker lamp (United States Of America) (E4e6)

The trailer recognition control unit actuates the corresponding components for the lighting system on the trailer through the trailer hitch socket, 13-pin (X58).

The front SAM control unit sends the "Standing lights actuation active" status via the interior CAN to the upper control panel control unit, then the upper control panel control unit actuates the standing lights indicator lamp (S1e3) in the rotary light switch via the instrument panel LIN.

Additional function requirements for lights on reminder
^ Standing lights ON
^ Driver door OPEN
^ Transmitter key (A8/1) removed

Lights on reminder function sequence
The logic for actuating the lights on reminder warning function is stored in the instrument cluster (A1).
The front SAM control unit sends the "Standing light actuation active" to the interior CAN.
The status of the driver door is sent by the left door control unit (N69/1) (model 216) or from the left front door control unit (N69/1) (model 221) to the interior CAN and the current circuit 15 status by the EIS [EZS] control unit (N73) to the chassis CAN.
The central gateway control unit (N93) routes all relevant information over the central CAN (CAN F) to the instrument cluster. The instrument cluster links this with the status of the headlamp switch-off delay (SWA) function and accordingly generates the request to issue the light warning function.

The instrument cluster then actuates the warning buzzer (A1h1) for acoustic output of the light warning. The message "Switch off lights" also appears in the multifunction display (A1p13) of the instrument cluster.

The standing lights may be switched on because the low beams have been manually switched on, because of the auto on/off headlamps, the daytime running lights or manually via the rotary light switch.

If the standing lights have been activated by manually switching on the low beams, the auto on/off headlamps or the daytime running lights and the driver door is then opened with a transmitter key in the EIS [EZS] control unit, the standing lights are switched off.

If the transmitter key is removed from the EIS [EZS] control unit when the rear fog light actuation is active, and then the driver do is opened, the instrument cluster actuates the warning buzzer and issues a corresponding message on the multifunction display.

The request to deactivate rear fog light actuation via the rotary light switch prevents the rear fog light actuation from being activated automatically the next time the vehicle is driven with the low beams switched on.

Parking lights actuation function sequence
By turning the rotary light switch to the left parking lights position or the right parking lights position, the parking lights actuation is requested for the corresponding side of vehicle
The upper control panel control unit reads in the status of the rotary light switch via instrument panel LIN and transmits this to the front SAM control unit via interior CAN.
The front SAM control unit generates the request to "Switch on the standing lights" and send it, via the interior CAN, to the rear SAM control unit and on vehicles with code (550) Trailer hitch to the trailer recognition control unit.

Left parking light:
The front SAM control unit actuates the left standing and parking lights.
The rear SAM control unit actuates the left brake light, taillight and parking light.

The trailer recognition control unit on vehicles with code (550) Trailer hitch, actuates the corresponding components of the lighting system on the trailer via the trailer hitch socket.

Right parking light:
The front SAM control unit actuates the right standing and parking lights.
The rear SAM control unit actuates the right brake light, taillight and parking light.
The trailer recognition control unit actuates the corresponding components for the lighting system on the trailer through the trailer hitch socket.