Air Mixing Damper Arm, Repairing

All cars from year model 1990, up to chassis number N1042558 are equipped with generation 2 automatic climate control (ACC2).

It has become apparent that the stepping motor which controls the air mixing damper has two wide a range. In certain cases, this can lead to the damper levers (A) breaking.
In order to make it possible to repair damaged dampers as simply as possible, a spare parts lever made of steel has been developed. The spare pants lever can be used if the air mixing damper lever is damaged in the area marked (C). If the damage is outside this area, the entire damper must be changed.
In production, from chassis number N1042529, a rubber bushing has been installed to the end position stop closest to the connector (B), which limits the control range.

Materials
Spare parts kit 74 96 433
Kit contains the following items:
- Rubber bushing, 43 82 826
- Steel lever, 43 83 857







To Install steel lever
1 Switch on the ignition.
2 Select "LO" on the ACC control module.
3 Switch off the ignition.
4 Remove the cover over the bulkhead.
5 Detach the cable from the damaged part of the lever (A).
6 Install the steel lever (D).
7 Secure the steel lever by pressing in locking lug E.
8 Reinstall the cable and press on the clip.
9 Reinstall the cover over the bulkhead.
10 Remove the ACC control module from the facia.
11 Install rubber bushing part number 4382826 to the lever's rear end position stop (B).
12 Place the ACC control module in position in the facia.
13 Calibrate the ACC control module by switching on the ignition and then pressing "AUTO" and "VENT" at the same time.