Fold left/right outside mirror, function

P88.79-2170-06

Shown on folding-in/out manually

1 Terminal status

2 Adjustment requirement

3 Vehicle speed signal

4 Fold in/out mirror housing

A1 Instrument cluster

M21/1 Left electrically adjustable and heated outside mirror

M21/1m3 Mirror fold-in motor

M21/2 Right electrically adjustable and heated outside mirror

M21/2m3 Mirror fold-in motor

N69/1 Left front door control unit

N69/2 Right front door control unit

N73 EIS [EZS] control unit

S50/1 Outside mirror adjustment switch with/without mirror fold-in/fold out facility

S50/1s3 Outside mirror fold-in/fold-out switch

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CAN B Controller Area Network Bus Class B (interior) (CAN-B)

S bus Switching bus

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Manually folding-in/out, function

Function requirements

 Circuit 15R On or circuit 15 ON

 No overvoltage or undervoltage

 No mirror lens adjustment active

 Speed signal < 47 km/h for folding in mirror housing

Function

The housing of the left and right outside mirror can be folded in and out electrically . The housings of the left and right outside mirrors can be moved to the garage position (mirror housing folded in) or the driving position (mirror housing folded out) via the outside mirror fold-in/out switch which is located in the outside mirror adjustment switch.

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For this purpose it is only necessary to momentarily press the outside mirror fold-in/out switch and the housings of the left and right outside mirror are automatically adjusted to the selected position.

The adjustment request of the outside mirror fold-in/out switch is read in by via the switch bus by the left front door control unitThe left front door control unit has the master function during adjustment and relays the signal to the right front door control unit via the CAN-B bus.

The left front door control unit actuates the mirror fold-in motor in the left outside mirror and the right front door control unit actuates the mirror fold-in motor in the right outside mirror.

If the function prerequisite c. 15R ON is not present after starting to fold in or out the adjustment is continued until the end position is reached.

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 The left front door control unit receives the speed signal by the instrument cluster via the CAN-B bus.The mirror housings can only be folded in up to a maximum speed of 47 km/h.

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Abort conditions

Electrical movement to the position is interrupted if:

 the outside mirror lens adjustment is actuated by a switch

 a memory request is present from the driver

 a function prerequisite is no longer present (except circuit status)

After interruption the outside mirror fold-in/out function is continued

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Automatically folding in/out, function

Function requirements

When folding in

 Circuit 15C OFF

 Function in instrument cluster activated

 Mirror housing last actuated in the fold out direction

 No overvoltage or undervoltage

When folding out

 Terminal 15R ON or

 Driver and passenger door open

 Mirror has automatically folded in previously

 No overvoltage or undervoltage

Function

When the vehicle is locked with the central locking (CL) from outside with the transmitter key (A8/1) both mirror housings are folded in automatically (garage position). The next time the vehicle is unlocked with the CL and the driver or passenger door are opened, the mirror housings are returned to the previous position.

If the mirror housing is still folded in with c. 15R ON with a previous automatic folding-in procedure the mirror housings are folded out immediately.

If the mirror housings were manually adjusted to the garage position, the mirror housings are not adjusted via the automatic adjustment.

The automatic fold-in/out function can interrupted any time by adjusting the mirror in the outside mirror switch.

The master for this function is the left front door control, responsible for actuating the left outside mirror as well as for transmission of the corresponding signals to the right front door control unit via the CAN-B bus to actuate the right outside mirror

Abort conditions

Electrical movement to the position is interrupted if:

 the outside mirror lens adjustment is actuated by a switch

 folding-in/out is activated by a switch actuation

 a memory request is present

 a function prerequisite is eliminated

After interruption, the outside mirror fold-in/out function is continued