Various Function Failures In The Door Control (LI72.40-P-055045)

Publication date: 2013-01-07
Reference number: LI72.40-P-055045

VARIOUS FUNCTION FAILURES IN THE DOOR CONTROL

TECHNICAL SERVICE BULLETIN

Reference Number(s): LI72.40-P-055045 Version 2, Date of Issue: January 07, 2013

Mercedes-Benz:	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
Design Group:	72.40 Door control
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

NOTE:

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

Perform reset of affected door control unit (unplug connector 3 at DCU-xF for approx. 20 seconds)
Perform normalization of power window system.
Erase fault memory.
Check whether the fault was rectified by the reset.
=> Fault not rectified: Continue with step 5.

=> Fault rectified: Continue with step 6.
Replace door control unit (DCU-xF).
Perform initial startup of door control unit: (Xentry Diagnostics => Control unit view => DCU-xF => Adaptations => Initial startup)

SYMPTOMS

Body / Door/Flap / Outside mirror / Mirror/Mirror adjustment / Operation malfunction

Body / Glazing / Window lifting mechanism/window operation / Does not run up

Body / Seat / Seat adjustment / Function error

Overall vehicle / Safety and locking system / Locks/locking/Remote closing mechanism / Does not open

Overall vehicle / Safety and locking system / Locks/locking/Remote closing mechanism / Does not close

Overall vehicle / Safety and locking system / Locks/locking/Remote closing mechanism / Nonfunctional

Body / Door/Flap / Outside mirror / Mirror heater / Nonfunctional

Body / Door/Flap / Outside mirror / Power folding mirrors / Nonfunctional

Body / Door/Flap / Outside mirror / Mirror/Mirror adjustment / Mirror dimming function error

CONTROL UNIT/FAULT CODE

Control unit	Fault code	Fault text
DCU-RF - Right front door (N69/2) (DMFR_212) (GLK (204), C (204), SLK (172), E (212), CLS (218), E (207))	A10A00	The power supply in the system is too low.
DCU-LF - Left front door (N69/1) (DMFL166) (B (246), A (176), SL (231), M (166))	B210C16	The power supply is outside the valid range. The limit value for electrical voltage has not been attained.
DCU-RF - Right front door (N69/2) (DMFR166) (B (246), A (176), SL (231), M (166))	B210C16	The power supply is outside the valid range. The limit value for electrical voltage has not been attained.
DCU-LF - Left front door (N69/1) (DMFL166) (B (246), A (176), SL (231), M (166))	B224F49	Control unit "Door" has a malfunction. There is an internal electrical fault.
DCU-LF - Left front door (N69/1) (DMFL_212) (GLK (204), C (204), SLK (172), E (212), CLS (218), E (207))	A10A00	The power supply in the system is too low.
DCU-RF - Right front door (N69/2) (DMFR166) (B (246), A (176), SL (231), M (166))	B224F49	Control unit "Door" has a malfunction. There is an internal electrical fault.
DCU-LF - Left front door (N69/1) (DMFL166) (B (246), A (176), SL (231), M (166))	B210A00	The power supply in the system is too low.
DCU-LF - Left front door (N69/1) (DMFL_212) (GLK (204), C (204), SLK (172), E (212), CLS (218), E (207))	A10C16	The power supply is outside the valid range. The limit value for electrical voltage has not been attained.
DCU-RF - Right front door (N69/2) (DMFR166) (B (246), A (176), SL (231), M (166))	B224F41	Control unit "Door" has a malfunction. There is a general checksum error.
DCU-LF - Left front door (N69/1) (DMFL166) (B (246), A (176), SL (231), M (166))	B224F41	Control unit "Door" has a malfunction. There is a general checksum error.
DCU-RF - Right front door (N69/2) (DMFR166) (B (246), A (176), SL (231), M (166))	B210A00	The power supply in the system is too low.
DCU-RF - Right front door (N69/2) (DMFR_212) (GLK (204), C (204), SLK (172), E (212), CLS (218), E (207))	A24F41	Control unit "Door" has a malfunction. There is a general checksum error.
DCU-LF - Left front door (N69/1) (DMFL_212) (GLK (204), C (204), SLK (172), E (212), CLS (218), E (207))	A24F49	Control unit "Door" has a malfunction. There is an internal electrical fault.
DCU-RF - Right front door (N69/2) (DMFR_212) (GLK (204), C (204), SLK (172), E (212), CLS (218), E (207))	A24F49	Control unit "Door" has a malfunction. There is an internal electrical fault.
DCU-LF - Left front door (N69/1) (DMFL_212) (GLK (204), C (204), SLK (172), E (212), CLS (218), E (207))	A24F41	Control unit "Door" has a malfunction. There is a general checksum error.
DCU-RF - Right front door (N69/2) (DMFR_212) (GLK (204), C (204), SLK (172), E (212), CLS (218), E (207))	A10C16	The power supply is outside the valid range. The limit value for electrical voltage has not been attained.