LI91.10-P-048411 Service Bulletin/Repair Instructions

EN
RY

Failure of pneumatic 4-way lumbar support
Topic number
Ll91.10-P-048411
Version
6
Design group
91.10 Front seats
Date
07-12-2014
Validity
Model series 204, 212, 218, 207, 164, 251 with pneumatic lumbar support!

Not valid for code 409 or 432 (multicontour or dynamic

seat)
Reason for change
Document updated
Reason for block
Complaint:

The pneumatic 4-way lumbar support fails.

Lumbar support pockets cannot be filled up or they drain.
Cause:

Component failure in lumbar support control unit.
Remedy:

Precise fault location:

Check whether the air pockets exhibit a leakage before replacing any components.

1. Remove seat-back lining of affected seat

2. Cut through red and yellow air line at a point 5 cm after connector (see IMG_2157)

3. Connect pressure tester to red and yellow line in sequence

4. Fill each with max. 300mbar

5a. If pressure drops within 30 sec, one of the bladders is failing and the complete lumbar support module has to be

replaced.

The currently valid part number can be found in the EPC.

5b. If there is no pressure loss detected, then the lumbar support parts kit is generally to be used

Install pump and control unit:

Replace control unit and pump as follows

- Disconnect blue line from control unit using special tool W000589043700 (see IMG_2154)

- Detach electrical connector (see IMG_2155)

- Release mounting clip (see IMG_2156)

- Install new control unit (s. IMG_2159); when doing so, push brass connectors all the way onto air lines (see

IMG_2160)

- Disconnect electrical connection on the old pump

- Detach spring of wire suspension (see IMG_2158) and slide pump with foam bag off wire

- Slide new pump onto wire (see IMG_2161)

- Reattach wire suspension and position the pump correctly

- Connect blue pneumatic line to control unit (see IMG_2160)

- Re-connect the electrical connections of the pump and control unit

- Perform a function test; when doing so check for leaks and noise in the pump. If necessary, re-position the pump

- Complete re-assembly of seat

07-12-2014 3:45 AM

©Copyright Daimler AG
I1
PLUBONS
Page 1/17
EN
RY
Important: Always install a new control unit and pump!
Attachments

File
Description
IMG 2154.JPG
Disconnect air line
IMG 2155.JPG
Detach electrical connector
IMG 2156.JPG
Unfasten control unit clips
IMG 2157.JPG
Cut through air lines
\MG 2159.JPG
Install control unit
IMG 2160.JPG
Control unit installed
\MG 2158.JPG
Unhook spring
IMG 2161.JPG
Slide on pump
Symptoms

Body I Seat I Lumbar support I Nonfunctional
Parts

Part number
ES1 ES2
EPC Other

make

part
Designation
Quantity Note
A0005802810
Lumbar support parts kit
1
Lumbar support pump with

control unit.

Valid for model series 164,

251,212,204
x
A0005802910
Lumbar support parts kit
1
Lumbar support pump with

control unit.

Valid for model series 207
x
W00058904370 0
Pliers
1
Special tool for disconnecting

the pneumatic connections.
x
W20158913210 0
Tester
1
Pressure tester
x
Work units

Op. no.
Operation text
07-12-2014 3:45 AM

©Copyright Daimler AG
I1
Time
Damage

code
Note
80A09 52
Control unit for lumbar support for

left front seat
80N09 52
Control unit for lumbar support for

right front seat
91003 04
Air cushion for adjustable lumbar

support on left front seat

Only use when air cushion diagnosis

shows a leak
91S03 04
Air cushion for adjustable lumbar

support on right front seat
PLUBONS

Page 2/17
Only use when air cushion diagnosis

shows a leak
WIS-References

Note
Allocation
Document number
Tille
ar91.25-p-1710cw
Remove/install multicontour MODEL 204.0 /2 /3 (except Remedy

204.077 /277) with CODE

seat regulating valve

(409) LeWright front multicontour seats

MODEL 207, 212, 218 with

CODE (409) LeWright front

multicontour seats
Validity

Engine
Transmission
164.120
•
•
164.121
•

•

•

•
•
Vehicle
164.122

164.124

164.125

164.128

164.156

164.172
164.186
•

•

•
164.195
•
164.822
•

•

•

•

•

•

•

•

•
164.175

164.177
164.824

164.825

164.828

164.871

164.886

204.000

204.001

204.002

204.003

204.006

204.007

204.008

204.022

204.023

204.025
07-12-2014 3:45AM

©Copyright Daimler AG
Il
•

•

•
.

•

•

•

•

•

•
•
•

•

•

•

•

•

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•
•

•

•

•
•

•

•

•

•

•

•

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PLUBONS

Page 3/17
EN
RY

204.041

204.044

204.045

204.046

204.047

204.048

204.049

204.052

204.054

204.055

204.056

204.057

204.065

204.080

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

204.241

204.245

204.246

204.247

204.248

204.249

204.252

204.254

204.256
.
•

•
•

•

•
•

•

•

•

•

•

•

•
•
.

•

•

•

•

•
•

•

•

•

•
.

.

•

•

•

•
•

•

•

•
•

•

•

•

•

*
•

•
•
•
•

•

•

•
•

•

•

•

•

•

•

•

•

•

•
*
.

•

•

•
.

.
204.292
•
07-12-2014 3:45 AM
•

•

•
•

•

•

•

•

•

•
204.257

204.282

204.289
©Copyright Daimler AG
I1
•

•

•

•

•

•

•
PLUBONS

Page 4117
:CENT RV

204.302

204.303

204.347

204.349

204.357

204.902

204.956

204.981

204.982

204.983

204.984

204.987

207.303

12 3 4

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