Stepper Motor Installation Details (M2/4) ventilation damper actuator
1. Disconnect the negative cable from the battery, then remove the instrument panel (see chapter Body).
2. Remove the support bracket that secures the evaporator casing to the floor panel (see Section Removal and installation of the evaporator of the K / V system and its casing).
3. Remove the three fixing screws (1) (TORX sockets), disconnect the connector (3) electrical wiring and remove the electric motor (M2/4) air damper actuator from heater/evaporator housing (in the bulkhead area).
4. Installation is carried out in the reverse order.
5. In conclusion, the electric motor should be normalized (M2/4) using the STAR DIAGNOSIS reader, - contact a Mercedes-Benz workshop for assistance.
6. Do not forget to also clear the memory of the processor of the on-board self-diagnosis system (see chapter Engine Electrical Systems).
7. Make sure that the A/C system is working properly.