Mercedes-Benz Mercedes Benz OEM Parts Mercedes Benz OE Replacement Parts
Technical Service Bulletin # LI72-20_P-0553012 Date: 130326
Body - Automatic Liftgate Intermittently Doesn't Open Automatic liftgate occasionally fails to open
Topic number LI72.20-P-055301
Version 2
Design group 72.20 Rear door, tailgate
Date 03-26-2013
Validity MODEL 166
Reason for change Complaint and Remedy revised
Complaint: - When the liftgate is closed, with the liftgate lock in the unlocked condition, the liftgate occasionally fails to open automatically.
- The opening sequence of the liftgate control is sometimes aborted.
Cause: Implausible position sensor signal
Remedy: Remove pins from Hall sensor for drive unit on liftgate control (HKS) on plug connector 2 of control unit for liftgate control as follows:
1. Remove liftgate control unit (HKS) as per WIS documentation (see WIS references). => In model series X166 the trunk covering must not be removed!
2013 Mercedes Benz Truck ML 63 AMG (166.074) V8-5.5L Turbo (157.980) Page 60
2. Detach plug connector 2 (blue connector) from liftgate control (HKS) control unit (picture 1).
3. Remove Pin 1 (GY), Pin 2 (YE) and Pin 5 (BN) on plug connector 2 (picture 2).
2013 Mercedes Benz Truck ML 63 AMG (166.074) V8-5.5L Turbo (157.980) Page 61
4. Insulate individual pins using insulation tape (picture 3).
5. Secure removed lines on wiring harness (picture 4).
2013 Mercedes Benz Truck ML 63 AMG (166.074) V8-5.5L Turbo (157.980) Page 62
6. Connect plug connector 2 (blue plug connector) to liftgate control (HKS) control unit (picture 5).
7. Install liftgate control (HKS) control unit as per WIS documentation (see WIS references).
NOTE:
If the liftgate control (HKS) fails to function after removing the pins, perform initial startup and deletion of the fault memory for the liftgate control (HKS) control unit.
Attachments
Symptoms
Control unit/fault code
WIS-References
Technical Service Bulletin # LI72-20_P-0553012 Date: 130326
Body - Automatic Liftgate Intermittently Doesn't Open Automatic liftgate occasionally fails to open
Topic number LI72.20-P-055301
Version 2
Design group 72.20 Rear door, tailgate
Date 03-26-2013
Validity MODEL 166
Reason for change Complaint and Remedy revised
Complaint: - When the liftgate is closed, with the liftgate lock in the unlocked condition, the liftgate occasionally fails to open automatically.
- The opening sequence of the liftgate control is sometimes aborted.
Cause: Implausible position sensor signal
Remedy: Remove pins from Hall sensor for drive unit on liftgate control (HKS) on plug connector 2 of control unit for liftgate control as follows:
1. Remove liftgate control unit (HKS) as per WIS documentation (see WIS references). => In model series X166 the trunk covering must not be removed!
2013 Mercedes Benz Truck ML 63 AMG (166.074) V8-5.5L Turbo (157.980) Page 60
2. Detach plug connector 2 (blue connector) from liftgate control (HKS) control unit (picture 1).
3. Remove Pin 1 (GY), Pin 2 (YE) and Pin 5 (BN) on plug connector 2 (picture 2).
2013 Mercedes Benz Truck ML 63 AMG (166.074) V8-5.5L Turbo (157.980) Page 61
4. Insulate individual pins using insulation tape (picture 3).
5. Secure removed lines on wiring harness (picture 4).
2013 Mercedes Benz Truck ML 63 AMG (166.074) V8-5.5L Turbo (157.980) Page 62
6. Connect plug connector 2 (blue plug connector) to liftgate control (HKS) control unit (picture 5).
7. Install liftgate control (HKS) control unit as per WIS documentation (see WIS references).
NOTE:
If the liftgate control (HKS) fails to function after removing the pins, perform initial startup and deletion of the fault memory for the liftgate control (HKS) control unit.
Attachments
Symptoms
Control unit/fault code
WIS-References
