LI91.10-P-048411

Failure of pneumatic 4-way lumbar support
Topic number
LI91.10-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
PLUBONS
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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
IMG_2159.JPG
Install control unit
IMG_2160.JPG
Control unit installed
IMG_2158.JPG
Unhook spring
IMG_2161.JPG
Slide on pump
Symptoms
Body / Seat / Lumbar support / Nonfunctional
Parts
Part number
ES1 ES2 Designation
Quantity Note
EPC Other
make
part
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
Time
PLUBONS
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
91D03 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
Page 2/17
Only use when air cushion diagnosis
shows a leak
WIS-References
Document number
Title
Note
Allocation
ar91.25-p-1710cw
Remove/install multicontour MODEL 204.0 /2 /3 (except Remedy
seat regulating valve
204.077 /277) with CODE
(409) Left/right front multicontour seats
MODEL 207, 212, 218 with
CODE (409) Left/right front
multicontour seats
Validity
Vehicle
Engine
Transmission
164.120
*
*
164.121
*
*
164.122
*
*
164.124
*
*
164.125
*
*
164.128
*
*
164.156
*
*
164.172
*
*
164.175
*
*
164.177
*
*
164.186
*
*
164.195
*
*
164.822
*
*
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 3:45 AM
© Copyright Daimler AG
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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
*
*
204.257
*
*
204.282
*
*
204.289
*
*
204.292
*
*
07-12-2014 3:45 AM
© Copyright Daimler AG
PLUBONS
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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
*
*
207.322
*
*
207.347
*
*
207.356
*
*
207.357
*
*
207.372
*
*
212.002
*
*
212.003
*
*
212.005
*
*
212.024
*
*
212.025
*
*
212.047
*
*
212.048
*
*
212.054
*
*
212.056
*
*
212.057
*
*
212.072
*
*
212.077
*
*
212.087
*
*
212.089
*
*
212.090
*
*
212.202
*
*
212.203
*
*
212.205
*
*
212.225
*
*
212.247
*
*
212.248
*
*
212.254
*
*
212.256
*
*
212.257
*
*
212.272
*
*
07-12-2014 3:45 AM
© Copyright Daimler AG
PLUBONS
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212.287
*
*
212.289
*
*
218.303
*
*
218.323
*
*
218.355
*
*
218.359
*
*
218.373
*
*
218.374
*
*
218.391
*
*
218.393
*
*
251.020
*
*
251.022
*
*
251.026
*
*
251.054
*
*
251.056
*
*
251.065
*
*
251.072
*
*
251.075
*
*
251.077
*
*
251.122
*
*
251.124
*
*
251.125
*
*
251.126
*
*
251.154
*
*
251.156
*
*
251.165
*
*
251.172
*
*
251.175
*
*
251.177
*
*
Vehicle
Engine
Transmission
164.120
642.940
722.902
164.121
642.820
722.902
164.122
642.940
722.902
164.124
642.820
722.902
164.125
642.820
722.902
164.128
629.912
722.903
164.156
272.967
722.906
164.172
273.963
722.904
164.175
113.964
722.901
164.177
156.980
722.907
Full model designation breakdown
07-12-2014 3:45 AM
© Copyright Daimler AG
PLUBONS
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164.186
272.967
722.906
164.195
272.973
722.550
164.822
642.940
722.902
164.824
642.820
722.902
164.825
642.820
722.902
164.828
629.912
722.903
164.871
273.923
722.904
164.886
273.963
722.904
204.000
651.913
711.653
204.000
651.913
716.656
204.000
651.913
722.694
204.000
651.913
722.996
204.001
651.913
711.653
204.001
651.913
716.656
204.001
651.913
722.694
204.001
651.913
722.996
204.002
651.911
711.653
204.002
651.911
716.656
204.002
651.911
722.646
204.002
651.911
722.908
204.003
651.911
711.670
204.003
651.911
722.646
204.003
651.911
722.908
204.006
646.812
711.655
204.006
646.812
716.608
204.006
646.812
716.657
204.006
646.812
722.699
204.007
646.811
711.655
204.007
646.811
716.608
204.007
646.811
716.655
204.007
646.811
716.657
204.007
646.811
722.699
204.008
646.811
716.657
204.008
646.811
722.640
204.022
642.960
711.670
204.022
642.960
722.902
204.023
642.834
711.670
204.023
642.834
722.903
204.025
642.830
711.670
204.025
642.830
722.902
204.041
271.950
711.656
204.041
271.950
716.607
204.041
271.950
716.635
07-12-2014 3:45 AM
© Copyright Daimler AG
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204.041
271.950
722.695
204.041
271.950
722.997
204.044
271.910
711.655
204.044
271.910
711.656
204.044
271.910
716.635
204.044
271.910
722.695
204.045
271.910
711.655
204.045
271.910
716.607
204.045
271.910
722.695
204.046
271.952
711.656
204.046
271.952
716.607
204.046
271.952
716.635
204.046
271.952
722.695
204.046
271.952
722.997
204.047
271.860
722.618
204.047
271.860
722.997
204.048
271.860
711.655
204.048
271.860
716.607
204.048
271.860
716.612
204.048
271.860
722.696
204.048
271.860
722.997
204.049
271.820
711.655
204.049
271.820
716.607
204.049
271.820
716.612
204.049
271.820
722.696
204.049
271.820
722.997
204.052
272.921
711.656
204.052
272.921
716.636
204.052
272.921
722.998
204.054
272.947
711.654
204.054
272.947
716.671
204.054
272.947
722.999
204.055
276.957
722.906
204.056
272.961
722.906
204.057
276.957
722.906
204.065
272.982
722.906
204.080
276.957
722.960
204.081
272.948
722.964
204.082
651.912
722.965
204.085
272.911
722.963
204.087
272.971
722.960
204.088
276.957
722.960
204.089
642.961
722.962
07-12-2014 3:45 AM
© Copyright Daimler AG
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204.092
642.832
722.962
204.200
651.913
711.653
204.200
651.913
716.656
204.200
651.913
722.694
204.200
651.913
722.996
204.201
651.913
711.653
204.201
651.913
716.656
204.201
651.913
722.694
204.201
651.913
722.996
204.202
651.911
711.653
204.202
651.911
716.656
204.202
651.911
722.646
204.202
651.911
722.908
204.203
651.911
711.670
204.203
651.911
722.646
204.203
651.911
722.908
204.207
646.811
711.655
204.207
646.811
716.608
204.207
646.811
716.655
204.207
646.811
716.657
204.207
646.811
722.699
204.208
646.811
716.657
204.208
646.811
722.640
204.222
642.960
711.670
204.222
642.960
722.902
204.223
642.834
711.670
204.223
642.834
722.903
204.225
642.830
711.670
204.225
642.830
722.902
204.241
271.950
711.656
204.241
271.950
716.635
204.241
271.950
722.695
204.241
271.950
722.997
204.245
271.910
711.655
204.245
271.910
716.607
204.245
271.910
722.695
204.246
271.952
711.656
204.246
271.952
716.607
204.246
271.952
716.635
204.246
271.952
722.695
204.246
271.952
722.997
204.247
271.860
722.618
204.247
271.860
722.997
07-12-2014 3:45 AM
© Copyright Daimler AG
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204.248
271.860
711.653
204.248
271.860
711.655
204.248
271.860
716.607
204.248
271.860
716.612
204.248
271.860
722.696
204.248
271.860
722.997
204.249
271.820
711.655
204.249
271.820
716.612
204.249
271.820
722.696
204.249
271.820
722.997
204.252
272.921
711.656
204.252
272.921
716.636
204.252
272.921
722.998
204.254
272.947
711.654
204.254
272.947
716.671
204.254
272.947
722.999
204.256
272.961
722.906
204.257
276.957
722.906
204.282
651.912
722.965
204.289
642.961
722.962
204.292
642.832
722.962
204.302
651.911
711.653
204.302
651.911
716.656
204.302
651.911
722.646
204.302
651.911
722.908
204.303
651.911
711.670
204.303
651.911
722.646
204.303
651.911
722.908
204.347
271.860
722.618
204.347
271.860
722.997
204.349
271.820
711.655
204.349
271.820
716.607
204.349
271.820
722.997
204.357
276.957
722.906
204.902
651.916
711.653
204.902
651.916
716.658
204.902
651.916
722.908
204.956
272.991
722.906
204.981
272.948
722.964
204.982
651.912
722.965
204.983
642.961
722.962
204.984
651.912
722.965
204.987
272.971
722.960
07-12-2014 3:45 AM
© Copyright Daimler AG
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207.303
651.911
711.670
207.303
651.911
722.646
207.303
651.911
722.908
207.303
651.911
725.011
207.322
642.836
722.902
207.347
271.860
722.618
207.347
271.860
722.997
207.356
272.961
722.906
207.356
272.988
722.906
207.357
272.982
722.906
207.357
272.984
722.906
207.372
273.966
722.904
212.002
651.924
711.653
212.002
651.924
716.656
212.002
651.924
722.646
212.002
651.924
722.908
212.002
651.924
725.011
212.003
651.924
711.670
212.003
651.924
722.646
212.003
651.924
722.908
212.003
651.924
725.011
212.005
651.925
711.653
212.005
651.925
716.656
212.005
651.925
722.694
212.005
651.925
722.996
212.005
651.925
725.011
212.024
642.850
711.670
212.024
642.850
722.902
212.024
642.850
725.011
212.025
642.850
711.670
212.025
642.850
722.902
212.025
642.850
725.011
212.025
642.856
711.670
212.025
642.856
722.902
212.025
642.856
725.011
212.047
271.860
722.618
212.047
271.860
722.997
212.048
271.860
711.655
212.048
271.860
716.612
212.048
271.860
722.696
212.048
271.860
722.997
212.054
272.952
711.654
212.054
272.952
722.999
07-12-2014 3:45 AM
© Copyright Daimler AG
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212.056
272.980
722.906
212.057
272.983
722.906
212.072
273.971
722.904
212.077
156.985
722.930
212.087
272.977
722.960
212.089
642.856
722.962
212.090
273.970
722.961
212.202
651.924
711.653
212.202
651.924
716.656
212.202
651.924
722.646
212.202
651.924
722.908
212.202
651.924
725.011
212.203
651.924
711.670
212.203
651.924
722.646
212.203
651.924
722.908
212.203
651.924
725.011
212.205
651.925
711.653
212.205
651.925
716.656
212.205
651.925
722.694
212.205
651.925
722.996
212.205
651.925
725.011
212.225
642.850
711.670
212.225
642.850
722.902
212.225
642.850
725.011
212.247
271.860
722.618
212.247
271.860
722.997
212.248
271.860
711.655
212.248
271.860
716.612
212.248
271.860
722.696
212.248
271.860
722.997
212.254
272.952
711.654
212.254
272.952
722.999
212.256
272.980
722.906
212.257
272.983
722.906
212.272
273.971
722.904
212.287
272.977
722.960
212.289
642.856
722.962
218.303
651.924
722.908
218.303
651.924
725.011
218.323
642.852
722.903
218.323
642.852
725.011
218.323
642.853
722.903
218.323
642.853
725.011
07-12-2014 3:45 AM
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218.355
276.952
722.906
218.355
276.952
725.011
218.359
276.952
722.906
218.359
276.952
725.011
218.373
278.922
722.909
218.373
278.922
725.011
218.374
157.981
722.931
218.391
278.922
722.967
218.391
278.922
725.041
218.393
642.854
722.966
218.393
642.858
722.966
251.020
642.950
722.902
251.022
642.950
722.902
251.026
642.950
722.902
251.054
272.945
722.999
251.056
272.967
722.906
251.065
272.967
722.906
251.072
273.963
722.904
251.075
113.971
722.901
251.077
156.980
722.907
251.122
642.950
722.902
251.124
642.870
722.902
251.125
642.870
722.902
251.126
642.950
722.902
251.154
272.945
722.999
251.156
272.967
722.906
251.165
272.967
722.906
251.172
273.963
722.904
251.175
113.971
722.901
251.177
156.980
722.907
Attachments
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© Copyright Daimler AG
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IMG_2154.JPG:
IMG_2155.JPG:
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IMG_2156.JPG:
IMG_2157.JPG:
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© Copyright Daimler AG
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IMG_2159.JPG:
IMG_2160.JPG:
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© Copyright Daimler AG
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IMG_2158.JPG:
IMG_2161.JPG:
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