LI72.40-P-055045 Service Bulletin/Repair Instructions

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Various function failures in the door control

Topic number
Ll72.40-P-055045
Version

Design group
72.40 Door control
Date
12-21-2012
Validity
MODEL 166 with code 803

MODEL 172 with code 803

MODEL 176 with code 803

MODEL 204 with code 803

MODEL 207 with code 803

MODEL 212 with code 803

MODEL 218 with code 803

MODEL 231 with code 803

MODEL 246 with code 803
Reason for change

Reason for block
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

Notes:

- The fault memory of the door control unit (DCU-xF) may contain stored fault codes that are listed under

"Control uniUfault 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).

12-21-2012 5:13 PM

© Copyright Daimler AG
CLANTZ4

Page 1/1 9
6. Perform initial startup of door control unit.

(Xentry Diagnostics => Control unit view=> DCU-xF =>Adaptations => Initial startup)
Symptoms

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

Body I Glazing I Window lifting mechanism/window operation I Does not ru n up

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

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

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

Body I Door/Flap I O utside mirror I Mirror heater I Nonfunctional

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

Body I Door/Flap I Outside mirror I Mirror/Mirror adjustment I Mirror dimming function error
Control unit/fault code

Contro l unit
Fault code
Fault text
DCU-RF - Right front door

(N69/2) (DMFR_212) (GLK

(204),C (204) ,SLK (172),E

(21 2),CLS (218),E (207))
A10AOO
The power supply in the system is too low.
DCU-LF - Left front door (N69/ B210C1 6

1) (DMFL 166) (B (246),A (176)

,SL (231),M (166))
The power supply is outside the valid range. The limit val ue for

electrical voltage has not been attained.
DCU-RF - Right front door

B210C 16

(N69/2) (DMFR166) (B (246),A

(176),SL (23 1),M (166))
T he power supply is outside the valid range. The limit va lue for

electrical volta ge has not been attained.
DCU-LF - Left front door (N69/ B224F49

1) (DMFL 166) (B (246),A (176)

,SL (23 1),M ( 166))
Control unit "Door" has a malfunction. There is an internal electrical fault.
DCU-LF - Left front door (N69/ A10AOO

1) (DMFL_212) (G LK (204),C

(204),SLK (172),E (212),CLS

(218),E (207))
The power supply in the system is too low.
DCU-RF - Right front door

B224F49

(N69/2) (DMFR166) (B (246),A

(176),SL (23 1),M (166))
Control unit "Door" has a malfunction . There is an internal electrical fault.
DCU-LF - Left front door (N69/ B210AOO

1) (DMFL 166) (B (246), A (1 76)

,SL (23 1),M ( 166))
The power supply in the system is too low.
DCU-LF - Left front door (N69/ A10C16

1) (DMFL_212) (GLK (204),C

(204),SLK (172),E (212),C LS

(2 18),E (207))
The power supply is outside the va lid ra nge. The limit value for

electrica l voltage has not been attained.
DCU-RF - Right front door

B224F41

(N69/2) (DMFR166) (B (246),A

(176),SL (231),M (166))
Control unit "Door" has a malfunction. There is a general checksum error.
DCU-LF - Left front door (N69/ B224F41

1) (DMFL 166) (B (246),A (176)

,SL (231),M ( 166))
Con trol unit "Door" has a malfunction. There is a general checksum error.
12-21 -2012 5:13 PM

© Copyright Daimler AG
CLANTZ4
Page 2/19
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R. Y
DCU-RF - Right front door

B210AOO

(N69/2) (DM FR166) (B (246),A

(176),SL (231),M (166))
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 (2 18),E (207))
A24F41
Control unit "Door" has a malfunction. There is a general checksum error.
DCU-LF - Left front door (N69/ A24F49

1) (DMFL_212) (GLK (204),C

(204),SLK (172),E (2 12) ,CLS

(218),E (207))
Control unit "Door" has a malfunction. There is an internal electrica l 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/ A24F41

1) (DMFL_212) (GLK (204),C

(204),S LK (172),E (212) ,CLS

(218),E (207))
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))
The power supply is outside the valid range. The limit value for

electrical voltage has not been attained.
A10C16
Validity

Vehicle

176.000

176.001

176.003

176.0 12

176.042

176.043

176.044

204 .000

204.001

204 .002

204.003

204 .006

204.007

204.008

204 .022

204.023

204.025

204.031

204.04 1
12-21 -20 12 5:13 PM

© Copyright Daimler AG
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}'ENTRY

204.044

204.045

204.046

204.047

204.048

204.049

204 .052

204 .054

204 .055

204 .056

204.057

204.065

204.077

204.080

204 .081

204.082

204.085

204 .087

204.088

204.089

204.092

204.200

204.201

204.202

204.203

204.207

204 .208

204 .222

204 .223

204.225

204.231

204.24 1

204.245

204.246

204.247

204.248

204.249

204 .252

204.254

204.256

204.257

204.277

204 .282
12-21-2012 5:13 PM

© Copyright Daimler AG
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CLANTZ4
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204.289
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204 .292
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204 .302
•
204 .377
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204 .388
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204 .901
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204.303

204.331

204 .347

204 .348

204 .349

204.357
204 .902

204 .904

204.956

12 3 4 5 6

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