Vehicle: All Technical Service Bulletins
Body/Electrical - Various Door Control Function Failures
Various function failures in the door control
Topic number LI72.40-P-055045
Version 2
Design group 72.40 Door control
Date 01-07-2013
Validity MODEL 166 with code 803 up to VIN end number A168336
MODEL 172 with code 803 up to VIN end number F062354 MODEL 176 with code 803 up to VIN end number J038712 MODEL 204 with code 803 up to VIN end number A824928 MODEL 204 with code 803 up to VIN end number G062313 MODEL 204 with code 803 up to VIN end number L218393 MODEL 204 with code 803 up to VIN end number R273380 MODEL 207 with code 803 up to VIN end number F209913 MODEL 212 with code 803 up to VIN end number A731976 MODEL 212 with code 803 up to VIN end number L093279 MODEL 218 with code 803 up to VIN end number A081880 MODEL 231 with code 803 up to VIN end number F014916 MODEL 246 with code 803 up to VIN end number J132310 MODEL 246 with code 803 up to VIN end number N037020
Reason for change Validity, complaint and symptom supplemented
Complaint:
Various function failures in the door control (only front doors affected):
^ Automatic window raising not possible
^ Power window cannot be normalized
^ Automatic fold in/out function of outside mirror faulty
^ Malfunction of central locking
^ Actuation of illumination in doors faulty
^ Malfunction of seat adjustment
Notes:
^ The fault memory of the door control unit (DCU-xF) may contain stored fault codes that are listed under "Control unit/fault code" (see below).
^ In the event of a complaint, the fault is continuously present.
Cause:
Waking of the door control units with a simultaneous voltage dip in the power supply (< 5 V) can cause the above function failures under certain circumstances.
Remedy:
1. Perform reset of affected door control unit (unplug connector 3 at DCU-xF for approx. 20 seconds)
2. Perform normalization of power window system.
3. Erase fault memory.
4. Check whether the fault was rectified by the reset.
=> Fault not rectified: Continue with step 5.
=> Fault rectified: Continue with step 6.
5. Replace door control unit (DCU-xF).
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2010 Mercedes Benz C 300 4MATIC (204.081) V6-3.0L (272.948)
6. Perform initial startup of door control unit: (Xentry Diagnostics => Control unit view => DCU-xF => Adaptations => Initial startup)
Symptoms
Control unit/fault code
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