Heating/A/C - Front Heater Blower Runs With Ignition OFF Front heater blower runs on although ignition is switched off

Mercedes-Benz Mercedes Benz OEM Parts Mercedes Benz OE Replacement Parts

 Technical Service Bulletin # LI83-30_P-056231 Date: 130422
Heating/A/C - Front Heater Blower Runs With Ignition OFF Front heater blower runs on although ignition is switched off
Topic number L183.30-P-056231
Version 1
Design group 83.30 Air conditioning
Date 04-22-2013
Validity X 166 with code 582 up to YoM 13/1 (vehicles up to code 804 -> as of code 804 already in production)
Reason for change
Complaint:
- The front heater blower runs on after the engine is switched off although the ignition is off.
The fault code 906E87 (The rear blower regulator has a malfunction. Message missing) is stored in the fault memory.
Cause: - The blower regulator of the rear A/C is confusing the LIN bus.
Remedy: Update software of air conditioning control unit (software available as of DVD 05/12)
Replacing the blower regulator does not remedy the issue!
Symptoms
Control unit/fault code