LI91.10-P-054143 Service Bulletin/Repair Instructions

Electric seat fore/aft adjustment nonfunctional

Topic number
Ll91.10-P-054143
Version
4
Design group
91.10 Front seats
Date
12-09-2013
Validity
Model series 204, 207, 212 and 218 with fully electric seat adjustment
Reason for change
Added part numbers for seat adjusters without memory.
Reason for block
Complaint:

1. Noises when operating electric seat fore/aft adjustment

2. Electric fore/aft adjustment nonfunctional

3. Adjustment is biased to one side, which bends the seat frame
Cause:

1. Frictional vibrations along fore/aft adjustment shaft

2. Motor detached owing to mechanical damage to electric motor retaining plate caused by the customer

3. One side of the seat adjustment drive shaft has come out
Remedy:

For models 204.3, 207, 212 and 218 the adjustment motor, shafts and electric motor retaining plate can be replaced:

(Contents of parts kit, see Pie 12)

1. Move seat to forwardmost position

2. Remove seat cushion as per work instructions (Note: you do not have lo cut the pnuematic lines as indicated in

work instructions (see Pic10) - take care not to pinch or kink the lines!)

3. Detach plastic rails used to mount control unit (Pic1)

4. Disconnect electric motor plug contact

5. Remove bolts T40 securing electric motor retaining plate (Pic2)

6. Push out electric motor upward (Pic3)

7. Remove electric motor

8. Pull shafts out of rails using pliers

Important: To ensure the parallelism of the two rails, do not twist the shafts and do not push against the rails mechanically.

9. Remove electric motor retaining plate

10. Position new electric motor retaining plate and screw in new bolts by a few threads

11. Insert shafts all the way into rails

Important: Do not turn the shafts by hand.

If the electric motor or one of the shafts has become detached as a result of the damage,

ii is essential to check and, if necessary, to restore the parallelism.

To do so, compare the longitudinal position of the rear edge of the respective rail using a measuring tape (Pic11)

and adjust by turning the inserted shaft

12. Attach rubber mounts to new electric motor

13. Attach electric motor to short shaft first (Pic4)

Note: The electrical connection must always point upward.

14. Attach rubber cap to long shaft and insert long shaft at electric motor

12-09-2013 7:48 PM

©Copyright Daimler AG
DAFARLE
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15. S!lcure shaft and electric motor on retaining plate (Pic5-7)

16. Tighten bolts securing electric motor retaining plate to 25Nm

17. Assemble remaining components in reverse order

For model 204.0 and 204.9 the entire seat frame must be replaced and seat motor should be reinforced:

The customer should be made aware that adjusting the seat with items underneath it can and will damage the seat.

Replace affected seat frame (follow WIS document AR91.1 O-P-1450CW). To prevent this issue from occurring again,

use a cable tie to secure the fore/aft motor to mounting bracket on both the new seat frame, as well as the other seat

frame (as illustrated in the attached picture motor_reinforce.jpg).
Attachments

File
Designation
Pic1.jpg
Unclip plastic rails
Pic2.jpg
Bolts securing electric motor retaining plate
Pic3.jpg
Remove electric motor
Pic4.jpg
Attach electric motor to short shaft
Pic5.jpg
Clip in shaft
Pic6.jpg
Clip in electric motor
Pic7.jpg
Clip in shaft
Pic11.JPG
Check parallelism
Pic10.jpg
Seat cushion without removing pnuematic lines
motor_reinforce.jpg
cable tie reinforcement
Symptoms

Body I Seat I Seat noises I Whirring

Body I Seat I Seat adjustment I Stiff/sluggish

Body I Seat I Seat adjustment I Does not adjust aft

Body I Seat I Seat adjustment I Does not adjust fore

Body I Seat I Seat adjustment I Noise

Body I Seat I Seat adjustment I Function error
Parts

Part number
ES1 ES2
Designation
Quantity Note
A0009107802
Parts kit - fore/aft adjustment
1
Left, with memory
A0009107902
Parts kit - fore/aft adjustment
1
Right, with memory
A 004 997 98 90
cable tie
2
Model 204.0 and 204.9 repairs

only
x
A 204 910 75 36
Left seat adjuster
1
Model 204.0 and 204.9 with

code 275
x
A 204 910 76 36
Right seat adjuster
1
Model 204. 0 and 204. 9 with

code 242
x
A 204 910 73 36
Left seat adjuster
1
Model 204.0 and 204.9 without

code 275
x
A 204 910 74 36
Right seat adjuster
1
Model 204.0 and 204.9 without

code 242
x
12-09-2013 7:48 PM

©Copyright Daimler AG
EPC Other

make

part
x

x
DAFARLE

Page 2111
Attachments

File
Designation
SDC12198.JPG
Content of parts kit
Work units

Op. no.
Time
Operation text
Damage

code
Note
91A1M 36
Left front seat electric seat fore/aft

adjustment shaft
91 N1 M 36
Right front seat electric seat fore/aft

adjustment shaft
WIS-References

Document number
Title
ar91.10-p-3310cw
Remove/install seat cushion Model series 207/212
Remedy
AR91.10-P-1450CW
Remove/install front seat

adjustment mechanism
Remedy
Note

Only for models 204.0 and

204.9
Allocation
Validity

Vehicle
Engine
Transmission
207.302
•
•
207.303
•
•
207.322
•

•
•

•

•

•

•

•

•

•

•

•

•

•

•

•
207.323

207.347
•
207.348
•
207.355
•

•

•

•

•

•

•
207.356

207.357

207.359

207.372

207.373

207.388

207.402

207.403
•

•
207.423
•

•
207.447
•
207.448

207.455
•

•
207.456
•
207.422
12-09-2013 7:48 PM

©Copyright Daimler AG
•
•

•

•

•
DAFARLE

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)~·ENTRY

207.457

207.459

207.472

207.473

212.002

212.003

212.005

212.020
•

•

•

•
•

•

•
•

•

•

•

•

•

•
•
•
212.021

212.023

212.024
•

•

•
•

•
•

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