MERCEDES-BENZ ML350 1997 Complete Repair Manual

AR91.29-P-0003GI
Remove/install seat adjustment switch unit on front seat
1.10.02

MODEL
163.113,

163.136 #A as of 051500,

163.136 #X as of 708319,

163.154 #A as of 051500,

163.154 #X as of 708319,

163.157 /172 with CODE (221b) Electrically adjustable driver and passenger seat

MODEL
163.128 /174 /175

P91.29-2109-11

1
Front seat

2
Front paneling

3
Screws

4
Outer paneling

5
Screws

8
Retaining lugs

S22
Left front seat adjustment switch

S22x1
Left front seat adjustment switch connector

S23
Right front seat adjustment switch

S23x1
Right front seat adjustment switch connector

X54/1
ESA [ESV] connector


Remove/install

1
Unscrew screws (3) from the front

paneling (2)

2
Pull down the front paneling (2) approx.

1 cm and remove forwards

Remove electrical line out of the clips on

the front paneling (2).

3
Unscrew screws (5) from the outer

paneling (4)

4
Remove outer paneling (4)

5
Disconnect left front seat adjustment switch

connector (S22x1) or right front seat

adjustment switch connector (S23x1) from the

left front seat adjustment switch (S22) or right
front seat adjustment switch (S23).

6.1
Disconnect seat adjustment

connector (X54/1)

Not fitted with memory switch for left

electrically adjustable front seat, code 241 or

memory switch for right electrically adjustable

front seat, code 242a.

7
Press retaining lugs (8) from left front seat

adjustment switch (S22) or right front seat

adjustment switch (S23) inwards

8
Remove left front seat adjustment switch

(S22) or right front seat adjustment

switch (S23)

9
Install in the reverse order

Copyright DaimlerChrysler AG 14.06.2006 CD-Ausgabe G/10/04 . This WIS print-out will not be recorde
d by Modification services.
Page 1

AR91.10-P-1060GH
Remove and install front seat backrest
5.3.97

MODEL
163.113 /136 /154 /157 /172

with CODE (221b) Electrically adjustable driver and passenger seat

with CODE (241) Memory for electrically adjustable left front seat
with CODE (242a) Memory for electrically adjustable right front seat

MODEL
163.128 /175

with CODE (241) Memory for electrically adjustable left front seat
with CODE (242a) Memory for electrically adjustable right front seat

MODEL
163.174

P91.10-0550-06

Shown on front seat without memory

switch for left electrically adjustable front

seat, code 241/memory switch for right

electrically adjustable front seat, code 242a

1
Front seat backrest

2
Screws

P91.10-2149-06

Shown on front seat with memory switch

for left electrically adjustable front seat,

code 241/memory switch for right

electrically adjustable front seat, code 242a

1
Front seat backrest

2
Screws

3
Heated seats connector

4
Connector for front seat backrest

incline motor

N32/1
Left front seat adjustment control

module with memory

N32/2
Right front seat adjustment control

module with memory


Remove/install

1
Remove front seat

AR91.10-P-1000GH

2
Remove paneling on front seat frame

AR91.10-P-1200GH

Copyright DaimlerChrysler AG 09.05.2006 CD-Ausgabe G/10/04 . This WIS print-out will not be recorde
d by Modification services.
Page 1

3.1
Disconnect heated seats connector (3) and

connector for front seat backrest incline motor

(4) from left front seat adjustment control

module with memory (N32/1) or right front

seat adjustment control module with memory
(N32/2)

Only for memory switch for left electrically

adjustable front seat, code 241 or memory

switch for right electrically adjustable front

seat, code 242a.


Installation:
Ensure that the electrical

lines are routed properly!

4
Unscrew screws (2) from backrest fittings


*BA91.10-P-1003-01B

Torx bit set

*000589011000

5
Remove front seat backrest (1)

6
Install in the reverse order


Front seats

Number

Designation
Model

Series 163

BA91.10-P-1003-01B
Bolt, front seat backrest to seat frame
Nm
30 (
F
3)

Torx bit set

000 589 01 10 00

Copyright DaimlerChrysler AG 09.05.2006 CD-Ausgabe G/10/04 . This WIS print-out will not be recorde
d by Modification services.
Page 2

AR91.10-P-1915GH
Remove/install seat backrest shell of front seat backrest
4.3.97

MODEL
163.113 /128 /136 /154 /157 /172 /174 /175

P91.10-2148-11

Shown on front seat as of VIN A145273 or as of VIN X708319

1
Front seat backrest

2
Backrest

3
Retaining lugs

4
Covering caps

5
Screws


Remove/install

1
Tilt front seat backrest (1) forwards

2.1
Remove cover caps (4) and unscrew

bolts (5)

As of VIN A145273 or as of

VIN X708319.

2.2
Lever the backrest shell (2) out of the front
seat backrest frame at bottom

Up to VIN A145272 or up to

VIN X708318: Lever the plastic clips out of

the front seat backrest frame using a long

wedge.

Installation wedge

*115589035900

3
Pull backrest shell (2) downward and remove


Installation:
Slide in backrest shell with
the retaining lugs (3) on the backrest head at

top.

4
Install in the reverse order

Longitudinal wedge

115 589 03 59 00

Copyright DaimlerChrysler AG 14.06.2006 CD-Ausgabe G/10/04 . This WIS print-out will not be recorde
d by Modification services.
Page 1

AR91.18-P-1820GH
Remove front seat backrest cover
30.4.97

MODEL
163.113 /128 /136 /154 /157 /172 /174 /175

P91.18-0394-06

1
Front seat backrest cover

2
Front seat backrest cushion

3
Front seat backrest frame

4
Backrest shell

5
Head restraint guides

6
Insert rails

7
Velcro closure

8
Wire of crosswise stapling

9
Wire rings


Remove/Install

1
Remove backrest shell (4) from the front seat

backrest

AR91.10-P-1915GH

2
Pull insert rails (6) of the front seat backrest

cover (1) off the front seat backrest

frame (3)

Relieve the load on the front seat backrest

cover by pressing down the front seat

backrest frame.

3
Compress the bottom end of the head
restraint guides (5) and pull out of the front

seat backrest frame (3)


Installation:
Install headrest guide with

release button on the left.

4
Detach the Velcro closure (7) from the front

seat backrest cover (1) up to the crosswise

stapling of the front seat backrest cushion (2)

5
Bend up the wire rings (9) of the crosswise

stapling (8)

6
Unhook wire of cross stapling (8) on the front

seat backrest cover (1) from the open wire

rings (9)

7
Pull the remaining Velcro closure (7) of the

front seat backrest cover (1) from the front

seat backrest cushion (2)

8Remove front seat backrest cover (1) from

the front seat backrest cushion (2)


Installation:
Align the front seat backrest

cover with the cutouts in the head restraint

guide.

9
Install in the reverse order

Copyright DaimlerChrysler AG 14.06.2006 CD-Ausgabe G/10/04 . This WIS print-out will not be recorde
d by Modification services.
Page 1

AR91.18-P-1800GH
Remove/install front seat cushion covering
6.3.97

MODEL
163.113 /128 /136 /154 /157 /172 /174 /175

P91.18-0396-06

1
Front seat cover

2
Front seat cushion

3
Front seat frame

4
Internal Torx drive bolts (front)

5
Internal Torx drive bolts (rear)

6
Seat adjustment mechanism

7
Plug in clips

8
Velcro closure

9
Wire rings

10
Crosswise stapling


Remove/install

1
Remove front seat backrest

AR91.10-P-1060GH

2
Pull insert rails of front seat cover (1) off front

seat frame (3)

Relieve the load on the front seat cover by

pressing down the front seat frame.

3
Press the plug-in clips (7) of the front seat

cover (1) out of the front seat frame (3)
4
Pull off the Velcro closure (8) from the front

seat cover (1) up to the crosswise stapling

(10) of the front seat cushion (2)

5
Bend open the wire rings (9) of the crosswise

stapling (10)

6
Unhook wire for the crosswise stapling (10)

on front seat cover (1) from opened wire rings

(9)

7
Pull remaining Velcro closure (8) off the front

seat cushion (2)

8
Remove front seat cover (1) from front seat

cushion (2)

9
Install in the reverse order

Copyright DaimlerChrysler AG 09.05.2006 CD-Ausgabe G/10/04 . This WIS print-out will not be recorde
d by Modification services.
Page 1

AR91.10-P-1200GH
Remove/install front seat frame trim
4.3.97

MODEL
163.113 /136 /154 /157 /172 with CODE (221b) Electrically adjustable driver and passenger seat

MODEL
163.128 /174 /175

P91.10-0548-11

Shown on right front seat

1
Front seat

2
Outer paneling

3
Front paneling

4
Inner paneling

5
Screws

6
Screws

7
Screws

8
Front seat seat belt buckle

9
Internal Torx drive bolt

S22x1
Left front seat adjustment switch connector

S23x1
Right front seat adjustment switch connector

X54/1
Seat adjustment connector


Remove/install

1.1
Remove front seat

Only necessary when removing the inner

paneling (4).

AR91.10-P-1000GH

2
Unscrew screws (5) from the front

paneling (3)

3
Pull down the front paneling (3) approx.

1 cm as far as the stop and remove forwards

4
Remove electrical line from the clips on the

front paneling (3)

5.1
Disconnect left front seat adjustment switch

connector (S22x1) or right front seat

adjustment switch connector (S23x1) at front
seat frame

Up to 08/98.

6
Unscrew screws (6) from outer paneling (2)

7
Remove outer paneling (2)

8.1
Disconnect left front seat adjustment switch

connector (S22x1) or right front seat

adjustment switch connector (S23x1) from
seat adjustment switch unit

As of 09/98.

9.1
Separate seat adjustment connector (X54/1)

from seat adjustment switch unit

Not fitted with memory switch for left

electrically adjustable front seat, code 241 or

with memory switch for right electrically

adjustable front seat, code 242a.

10
Remove electrical line from the clips on the

outer paneling (2)

11
Unscrew screws (7) from inner paneling

12
Remove inner paneling (4)

13
Install in the reverse order

Copyright DaimlerChrysler AG 09.05.2006 CD-Ausgabe G/10/04 . This WIS print-out will not be recorde
d by Modification services.
Page 1

GF91.29-P-0002GH
Electric seat adjustment with memory, function
14.7.99

MODEL
163 as of 1.1.00

with CODE (241) Memory for electrically adjustable left front seat
with CODE (242a) Memory for electrically adjustable right front seat

P91.29-2114-11

Illustrated on left front seat

S91
Left front ESA switch group (with memory)

S91s1
Fore/aft switch

S91s2
Rear raise/lower switch

S91s3
Front raise/lower switch

S91s5
Backrest fore/aft switch

S91s6
Memory button 1 switch

S91s7
Memory button 2 switch

S91s8
Memory button 3 switch

S91s9
Memory store button switch

S92
Right front ESA switch group (with memory)

S92s1
Fore/aft switch

S92s2
Rear raise/lower switch

S92s3
Front raise/lower switch

S92s5
Backrest fore/aft switch

S92s6
Memory button 1 switch

S92s7
Memory button 2 switch

S92s8
Memory button 3 switch

S92s9
Memory store button switch

Electric seat adjustment with memory

The driver and passenger seat can be adjusted electrically. They can

be adjusted manually with the adjustment switch in the corresponding

switch group for both front seats. It is possible to store and call up

three individual seat positions with the memory function.

Seat adjustment:

Key in ignition lock in position 1 or 2, or driver/passenger door

opened.

The electric seat adjustment with memory is controlled by switch

groups (S91, S92).

The head restraints can be adjusted manually.

Control modules

The left/right front seat adjustment control modules with memory

(N32/1, N32/2) control:

-
Four seat adjustment functions

-
The front seat adjustment forward/back motor groups (M27m1,

M28m1), the rear raise/lower motors (M27m2, M28m2) and the

front raise/lower motors (M27m3, M28m3) as well as the

backrest adjustment forward/back motors (M27m5, M28m5)

are identical on the left and right seats.
Function prerequisites

-
Circuit 15R on or (ignition lock in position 1)

-
Circuit 15 on or (ignition lock in position 2)

-
Driver/passenger door opened

Adjustment functions
-
Front height adjustment

-
Longitudinal adjustment

-
Rear height adjustment

-
Backrest adjustment

Group division

The adjustment functions are divided into two groups. It is only

possible to actuate one motor per group simultaneously. When the

seat adjustment switch is actuated for more than one adjustment

function within one group, actuation is accomplished in the following

sequence:

Group 1:
-
Rear height adjustment

Group 2:
-
Longitudinal adjustment

-
Front height adjustment

-
Backrest adjustment

Copyright DaimlerChrysler AG 14.06.2006 CD-Ausgabe G/10/04 . This WIS print-out will not be recorde
d by Modification services.
Page 1

The
seat position
is sensed by one potentiometer each on the

motors for the adjustment functions. Association of the direction of

rotation of the motor and the potentiometer is accomplished

automatically.

Button actuation

There are two possibilities for
storing
the
seat position
:

a)
First press and hold the memory button (S91s9 or S92s9) and

then press the corresponding memory location button

(S91s6/S91s7/S91s8 or S92s6/S92s7/S92s8) in addition.

b)
First press and then release the memory button (S91s9 or

S92s9). Then press the corresponding memory location button

(S91s6/S91s7/S91s8 or S92s6/S92s7/S92s8)

(within

T
3 s).

c)
Storage is accomplished in the left/right front seat adjustment

control modules with memory (N32/1, N32/2).
Calling up stored seat positions

Press desired memory location button (S91s6/S91s7/S91s8 or

S92s6/S92s7/S92s8) until the seat is adjusted to the stored position.

When adjusting the seat one adjustment function per group is

actuated. If the position button is released while moving to a stored

position the adjustment stops immediately.

Front seat adjustment switch group,

location/design/function
Model 163 with codes 241, 242a

GF91.29-P-2100GM

Front seat adjustment motor group,

location/function
Model 163 with codes 241, 242a

GF91.29-P-2103GM

Left front seat adjustment control module with

memory, location/purpose
Model 163 with codes 241, 242a

GF91.29-P-2106GH

Right front seat adjustment control module

with memory, location/purpose
Model 163 with codes 241, 242a

GF91.29-P-2107GH

Copyright DaimlerChrysler AG 14.06.2006 CD-Ausgabe G/10/04 . This WIS print-out will not be recorde
d by Modification services.
Page 2

AR91.29-P-1431GH
Remove/install backrest motor for front seat
7.4.97

MODEL
163.113 /136 /154 /157 /172 with CODE (221b) Electrically adjustable driver and passenger seat

MODEL
163.128 /174 /175

P91.29-0332-06

1
Front seat backrest cover

2
Backrest

3
Front seat backrest frame

4
Lock washer

5
Damper rubber

6
Nut

7
Adjusting shaft

M25m5
Backrest forward/back motor

X54/20
Backrest motor connector


Remove/install

1
Remove front seat backrest

AR91.10-P-1060GH

2
Remove backrest shell (2) from the front seat

backrest

AR91.10-P-1915GH

3
Pull the insert rails on the front seat backrest

cover (1) off the front seat backrest frame (3)

Relieve the load on the front seat backrest

cover by pressing down the front seat

backrest frame.

4
Pull off lock washer (4) of the adjusting shaft

(7) on one side


Installation:
Replace lock washer.

5
Unscrew nut (6) on backrest forward/back

motor (M25m5)


Installation:
Replace self-locking nut.

6
Remove damper rubber (5)

7
Pull out adjusting shaft (7) sideways

8
Disconnect backrest motor connector

(X54/20) from backrest forward/back motor

(M25m5)

9
Remove backrest forward/back

motor (M25m5)

Lift up front seat backrest cushion approx.

10 cm from the front seat backrest frame.

10
Install in the reverse order

Copyright DaimlerChrysler AG 14.06.2006 CD-Ausgabe G/10/04 . This WIS print-out will not be recorde
d by Modification services.
Page 1