Mercedes Benz E 63 AMG Sedan A/C - Blower Occasionally Inoperative/DTC's Stored Blower occasionally inoperative

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2010 Mercedes Benz E 63 AMG Sedan (212.077) V8-6.3L (156.985) Copyright ? 2013, ALLDATA 10.52SS Page 1
Vehicle: All Technical Service Bulletins
A/C - Blower Occasionally Inoperative/DTC's Stored
Blower occasionally inoperative
Topic number LI83.30-P-053637
Version 2
Design group 83.30 Air conditioning
Date 05-01-2012
Validity Model series 212, model series 207 (codes 802 and 052 or production date up to 01.12.2011)
Reason for change Fault codes moved to Complaint field
Complaint:
The blower is occasionally inoperative at low outside temperatures after engine start
If the following fault codes are present in the A/C control panel control unit, proceed as per Remedy:
912 F12 The front blower regulator has a malfunction. There is a short circuit to positive.
912 F11 The front blower regulator has a malfunction. There is a short circuit to ground.
912 F49 The front blower regulator has a malfunction. There is an internal electrical fault.
Cause:
Communication error between air conditioning control unit and blower regulator
Remedy:
Install latest software for A/C control panel, version 1102 or higher or Xentry DVD 03/12.
Replacing the blower motor or the blower regulator does not remedy the problem.
Remark:
Affected vehicles up to YoM 11/02 (codes 802 and 052 or production date up to 01.12.2011)
Symptoms