1997 MERCEDES-BENZ ML500 seat adjustment

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-1420GH
Removing and installing front power seat motor group (seat cushion)
7.3.97

MODEL
163 with CODE (221b) Electrically adjustable left and right front seats

P91.29-0333-06

1
Seat cushions

2
Screws

3
Screws

4
Front bearing plate

5
Rear bearing plate

6
Snap rings

7
Bearing pin

8
Screws

M25m2
Rear up/down motor

M25m3
Front up/down motor

Operation no. of operation texts or of standard texts and flat rates
Division
Operation

no.
Operation text

P
916008
REMOVING DRIVE MOTOR FOR DRIVER'S SEAT LONGITUDINAL ADJUSTMENT (SEAT REMOVED)

P
916013
REMOVING DRIVE MOTOR FOR DRIVER'S SEAT HEIGHT ADJUSTMENT (SEAT REMOVED)

P
916058
REMOVING DRIVE MOTOR FOR PASSENGER SEAT LONGITUDINAL ADJUSTMENT (SEAT REMOVED)

P
916063
REMOVING DRIVE MOTOR FOR PASSENGER SEAT HEIGHT ADJUSTMENT (SEAT REMOVED)


Removal, installation

1
Remove front seat backrest

AR91.10-P-1060GH

2
Unscrew screws (2) on seat frame

Torx bit set

*000589011000

3
Remove seat cushion (1) from seat

adjustment mechanism

4
Disconnect connectors from adjustment

motors (M25m2, M25m3)

5
Unscew screws (3) on bearigng plates (4, 5)

Torx bit set

*000589011000

6
Remove bearing plates (4, 5)

7
Remove snap rings (6) on bearing pins (7),

press bearing pins out of fork heads

8
Unscrew screws (8) on shaft beerings

Torx bit set

*000589011000

9
Remove adjustment motors (M25m2, M25m3)

10
Install in opposite order

11
Check for proper function

See Owner's Manual

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-1000GH
Remove/install front seat
3.3.97

MODEL
163.113 /128 /136 /154 /157 /172 /174 /175 with CODE (221b) Electrically adjustable driver and passe
nger seat

P91.10-0547-06

1
Torx socket screws

2
Cover cap

3
Front seat

4
Torx socket bolt

5
Belt end fitting

6
Connector

X55/3
Left front seat contacting strip

X55/4
Right front seat connector block


Remove/install

1
Remove headrest

See owner's manual

2
Remove cover cap (2) from seat rail paneling

Set the seat height adjustment such that

the screw on the belt end fitting is visible.

3
Unscrew internal Torx drive bolt (4) from the

belt end fitting (5)


*BA91.40-P-1001-01D


Torx bit set

*000589011000

4
Remove belt end fitting (5)

5
Unscrew internal Torx drive bolts (1) from the

front seat console

Installation:
Replace bolts.


*BA91.10-P-1001-01B

Torx bit set

*000589011000

6
Move the front seat (3) forward

7
Unscrew internal Torx drive bolts (1) from the

back seat console

Installation:
Replace bolts.


*BA91.10-P-1001-01B


Torx bit set

*000589011000

8
Detach connector (6) from the front left seat

connector block (X55/3) and the front right

seat connector block (X55/4)

9
Remove front seat (3)

10
Install in the reverse order


Front seats

Number

Designation
Model

Series 163

BA91.10-P-1001-01BBolt of seating mounting bracket to vehicle

floor
Nm
40


Safety belts/emergency tensioning retractors

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

AR91.18-P-1850GI
Remove and install cover on rear seat cushion
6.5.99

MODELS
163.136 /154 /172 as of 1.9.99,

163.113 /128 /157 /174 /175

P91.18-2031-09

1
Paneling of horizontal adjustment

handle

2
Horizontal adjustment handle

3
Rear seat cushion frame
8

Rear seat cushion

4
Lower cover

5
Rear seat upholstery side lip

6
Velcro closure

7
Rear seat cover


Remove/Install

1
Remove rear cargo space floor flaps

See Operating Instructions

2
Remove outer cover from rear seat

Do not remove remaining covers.

AR91.12-P-1100GH

3
Detach lateral curtain at bottom

4
Remove paneling of horizontal adjustment

handle (1)

Risk of breakage!

Unscrew screw and press paneling of

horizontal adjustment handle forwards in

order to unhook the retaining lugs.

5
Remove side cover on rear backrest fitting

6.1
Remove lower cover (4)

Only with 3rd seat row, code 847.

7
Detach rear seat cover (7) and Velcro closure
(6) at the outside of the rear seat cushion

frame (3)

8.1
Turn ignition key to "0" position

Only with side airbag in left and right rear,

code 293. To avoid fault codes.

9.1
Disconnect connector of electrical line of rear

side seat belt buckle and move out of

retaining clip

Only with side airbag in the rear

(left and right), code 293.

10.1
Carefully lift up rear seat cover and unscrew

bolt from belt end fitting

Do not damage rear seat cover.

Only 60% rear seat.


*BA91.40-P-1001-01D

Torx bit set

*000589011000

11.1
Remove belt end fitting together with rear

seat seat belt buckle though the rear seat

cushion

Do not damage rear seat cover.

Only 60% rear seat.

12
Remove rear seat cushion (8) from rear seat

cushion frame (3)

13
Pull off rear seat upholstery (7) until the

stapled wire rings become visible

14
Bend stapled wire rings up

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

AR91.12-P-1110GH
Remove and install rear seat cushion frame
23.5.00

MODELS
163.136 /154 /172 as of 1.9.99,

163.113 /128 /157 /174 /175

P91.12-2205-01 P91.12-2206-01 P91.12-2257-01
P91.12-2258-01 P91.12-2259-01

1
Retaining strap bolt

2
Rear seat cushion frame mounting

screws

3
Rear seat cushion frame

4
Screw
10

Clip

11
Cover

12
Rubber grommet

13
Handle locking device

5

Vertical adjustment handle

6
Vertical adjustment cable

7
Clip

8
Horizontal adjustment cable

9
Clip


Remove/install

1.1
Loosen Velcro lock in the left rear corner of
the rear seat cushion frame

Only 60% rear seat

2.1
Unscrew screw of retaining strap (1)

Only 60% rear seat


*BA91.12-P-1009-03A

Torx bit set

*000589011000

3
Remove paneling of horizontal adjustment

handle

Risk of breakage!

Unscrew screw and press paneling of

horizontal adjustment handle forwards in

order to unhook the retaining lugs.

4
Remove outer cover from rear seat

Do not remove the remaining covers.

AR91.12-P-1100GH

5
Remove curtain from the front and side of the

rear seat

6
Remove fold-down rear backrest

AR91.12-P-1720GI

7
Unhook the front of the rear seat covering on

both sides and at the back of the rear seat

cushion frame

8
Remove rear seat covering and rear seat

cushion from the rear seat cushion frame


Installation:
if a new rear seat cushion

frame is used for the 60% rear seat, the

center Velcro closure must be glued on.

9.1
Remove locking mechanism for automatic

front seat adjustment for easy entry to the rear

Only 40% rear seat for the 3rd seat row,

code 847.

AR91.12-P-1120GH

10
Detach cover (11) from vertical adjustment

handle (5)

11
Unscrew bolt (4) and detach vertical

adjustment handle (5) from rear seat cushion

frame

Press unlocking device and pull vertical

adjustment handle forwards. Observe

installed position of spring!

12
Unhook vertical adjustment cable (6) from

clips (7, 9)

Risk of breakage!

Clip (7) is concealed behind adhesive tape.


Installation:
glue on adhesive tape again

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

13
Unhook vertical adjustment cable (6) from

vertical adjustment handle (5)

14
Guide vertical adjustment cable (6) through

grommet (12)


Installation:
If a new rear seat cushion

frame is used, the grommet must be installed

in the new rear seat cushion frame.

15
Remove handle locking device (13) from rear

seat cushion frame

16
Unhook horizontal adjustment cable (8) at clip

(10) and at front of rear seat cushion frame

Risk of breakage!

17
Unscrew bolts from horizontal adjustment

handle

18
Detach horizontal adjustment cable (8) from

horizontal adjustment handle

Risk of breakage!

Pull out horizontal adjustment handle.

19
Remove rear seat seat belt buckle

40% rear seat without side airbag in left

and right rear, code 293.

AR91.40-P-1516GH

40% rear seat with side airbag in left and
right rear, code 293.

AR91.40-P-1516GK

60% rear seat outer seat.

AR91.40-P-1516GJ

20
Unscrew mounting screws for rear seat

cushion frame (2)

Installation:
Replace damaged shims at

the diagonal supports of the rear seat.


*BA91.12-P-1010-03A

21
Remove rear seat cushion frame (3)

Remove rear seat cushion frame through

tailgate

22
Install in the reverse order


Rear seats

Number

Designation
Model

163 as of

09/99

BA91.12-P-1009-03A
Bolt for clamping band to seat frame
Nm
45

BA91.12-P-1010-03A
Screw for bracket to seat frame
Nm
23

Torx bit set

000 589 01 10 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 2

AR91.12-P-1730GI
Remove and install locking mechanism for folding rear seat backrest
5.5.99

MODELS
163.136 /154 /172 as of 1.9.99,

163.113 /128 /157 /174 /175

P91.12-2133-06

1
Rear backrest release cable

2
Adjuster

3
Screws

4
Bolts

5
Rear backrest fitting


Remove/Install

1
Remove side covers at rear backrest

fitting (5)

2
Detach rear seat backrest release cable (1) at

adjuster (2)

Mark adjustment position on the thread.

Turn the adjuster counterclockwise until the

rear backrest release cable can be unhooked.

3
Unscrew bolts (3) from rear backrest fitting


With 60% rear seat:
Unscrew bolts (3) at
the same time in order to prevent the rear

backrest fitting from tipping.


*BA91.12-P-1006-03A

4
Unscrew bolts (4) from rear backrest fitting


*BA91.12-P-1007-03A

Torx bit set

*000589011000

5
Remove backrest fitting (5)

6
Install in the reverse order


Installation:
check unlocking function of

folding rear backrest.


Rear seats

Number

Designation
Model

163 as of

09/99

BA91.12-P-1006-03A
Bolt from backrest fitting to backrest
Nm
30

BA91.12-P-1007-03A
Screw for backrest fitting on seat frame
Nm
30

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