Function Failure Of Automatic Liftgate (LI72.20-P-052641)
Publication date: 2012-03-22Reference number: LI72.20-P-052641
FUNCTION FAILURE OF AUTOMATIC LIFTGATE
TECHNICAL SERVICE BULLETIN
Reference Number(s): LI72.20-P-052641 Version 3, Date of Issue:
March 22, 2012
| Mercedes-Benz: | MODEL 166.0 up to VIN end number 013750 |
| Design Group: | 72.20 Rear door, tailgate |
| Reason For Change: | Grammatical change |
COMPLAINT
Automatic liftgate Issue
Description of fault symptom:
- When the liftgate is in the closed state, the problem is that although the liftgate lock is unlocked, the liftgate does not open automatically.
- After a long idle period (>6 h) or a reset of the liftgate control unit (unplug connector 3 for approx. 2 min), the function is restored.
CAUSE
Software error in liftgate control unit.
REMEDY
Flash liftgate control units with repair software using Xentry Diagnostics (XD) (=>Control unit programming).
The repair software is available with add-on 2003 for XD DVD 09/11 and/or on XD DVD 11/11.
SYMPTOMS
SYMPTOMS
| Body / Door/Flap / Hood/flap / Trunk lid/liftgate / Does not open |
| Body / Door/Flap / Hood/flap / Trunk lid/liftgate / Does not close |
CONTROL UNIT/FAULT CODE
CONTROL UNIT/FAULT CODE
| Control unit | Fault code | Fault text |
|---|---|---|
| HKS - Tailgate control (N121/1) (PTCM166) | - | - |
WORK UNITS
WORK UNITS
| Op. no. | Operation text | Time | Damage code | Note |
|---|---|---|---|---|
| 54-0991 | CONTROL UNIT: .............INSTALL SOFTWARE (AFTER QUICK TEST) | 8210H E8 |