Heated Left/Right Outside Rearview Mirror

Function prerequisites
- Terminal 61 ON (engine running)
- Window regulator. not actuated
- No over or undervoltage

Function
The mirror heater (M21/1r1) in the left electrically adjustable and heated outside rearview mirror (M21/1) and the mirror heater (M21/2r1) in the right electronically adjustable and heated outside rearview mirror (M21/12) both consist of a heating resistor, which is located on the coating on the back of the mirror glass.

The heating resistor's voltage supply and its on / off switching control is done via the left front, door-control module (N69/1), right front, door control module (N69/2). The relevant door control module receives a CAN message from the front SAM control module with fuse and relay module (N10/1). When the outside temperature is t < 15 °C the mirror heater function is switched on and at t > 19 °C it is switched off. If the temperature value received by the CAN bus is implausible, the mirror heater function is switched on.