[R129 SL] FW: schematic request

[Jan Kuylaars]

On the front side of your seat you can find two Philips cross screws.
Turn them loose and pull them out. They are about 2 inches long and hold the
front of your seat clamped on the bar.
Then you can pull the front of your seat up, and lift it out off the two
holes under the backrest.
Now you can see the black plastic box where the relay circuit board is
situated.
You can pull of the top cover and then you see the wires with connectors.
Take out every connector one by one and push it back in good condition in
the box and try again.
If nothing happens for the complete range of control, you must first make a
measurement on the rectangle connector.
Open the door or set the lock switch on.
pen 2 must have 12 volt 25 Amps( red-white wire ) coming from fuse box 40G
in motor compartment just below the relay's .
pen 4 must have 12 volt 25 Amps( red-yellow wire) coming from fuse box 45L
in motor compartment.
pen 1 must be earth , so it is possible that there is rust and a bad
connection. It is mounted to the floor.
Clean and make a measure in resistance 0 ohm . if you don't have a ohm
measure equipment you can take a small 12 volt bulb and hold one lead to the
earth contact and the other lead to the inner contact of the cigarette
lighter.
The bulb must burn. If not or glowing just a small bit, the earth contact is
not good.
Clean again.

I have send two pictures from the system and the connectors, but the website
manager must confirm first.

Jan



-----Oorspronkelijk bericht-----
Van: r129list-bounces at mbcoupes.com
[mailto:r129list-bounces at mbcoupes.com]Namens mooncusser
Verzonden: dinsdag 10 april 2007 21:25
Aan: SL Mailing List
Onderwerp: Re: [R129 SL] FW: schematic request


Thanks... but I can't even get my hand under the seat.
I changed out all fuses as suggested and plugged in a spare seat control
switch.
Seat still won't respond...

On Tue, 10 Apr 2007 21:13:56 +0200, you wrote:


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>-----Oorspronkelijk bericht-----

>Van: Jan Kuylaars [mailto:J.kuylaars at kpnplanet.nl]

>Verzonden: dinsdag 10 april 2007 21:06

>Aan: SL Mailing List

>Onderwerp: RE: [R129 SL] schematic request

>

>

>Electric chairs from mercedes !

>

>seat control; first check your fuses. every seat has two fuses, the back

>control from left is together with

>the seat from right and vice versa.

>Then check the wires on the control box under the seats.

>control box; mentioned 5 connectors above 4 relai's

>

>connector above 1 relai = motor bottom seat up/down backside

>2nd connector= motor bottom seat up/down frontside

>3th connector= motor bottom seat forward and backwards

>4th connector= motor backrest forward and backwards

>5th connector= motor headrest up and down.

>

>The connectors on the other side:

>Just between connector 5 with 2 relai's between is the power connector.

>There should be 2 times 12 volt on the connector from 2 fuses in the

>motorcompartment

>Look well at the fuses because it me seem that they are good, but by age

>they are broken.

>For 3 $ you replace all the fuse by new, it is better to do after some

>years.

>On the left side is the connector from the door panel control, it give

power

>to the system if the door is open.

>Then you have open part and at the right against the 3 relai's there is the

>connector  what go's to

>the backrest for saftey.

>When the bottom from the chair is going backwards and the backrest is

almost

>coming to the side of the car, the motor is turning the backrest forward.

>

>You can take out the control box, remove carefully the relai covers and use

>very tiny sandpaper to clean the contacts.

>

>If you want to check the wiring and motors you can put the control box back

>and connect. Don't put the relaicovers back.

>if you take the 4 relai's to you, the left one controls the headrest

>up/down. 1/2 and 1/10

>you can give the cupper contact a light push and the motor will react.

>downwards push 1/2 and 2/9

>

>Then from left to right:

>first row; 1/2 3/4 5/6 7/8

>second row; 9/10 1/10 4/6/8

>third row; 2/9 3/5/7

>

>1=headrest up

>2=headrest down

>3=backrest backwards

>4=backrest forwards

>5=chair front

>6=chair back

>7=chair seat front up

>8=chair seat front down

>9=chair seat back up

>10=chair seat back down

>

>TEST PROCEDURE

>

>All values measured to ground unless otherwise noted

>Conn./Plug/Pin Pin Information Test Value Comments

>N32/1

>1.1 Coded voltage input, activates functions selected by S91 s5/s8/s9

>Measure to pin 1.4 approx. 2200 Ohms Note 1

>1.2 Coded voltage input, activates functions selected by S91 s3/s4/s7

>Measure to pin 1.4 approx. 2200 Ohms Note 1

>1.3 Coded voltage input, activates functions selected by S91 s1/s2/s6

>Measure to pin 1.4 approx. 2200 Ohms Note 1

>1.4 Left front power seat switch group power supply output Ignition on 5

VDC

>2.1 Main ground to W18 Approx. 0 Ohms to ground

>2.2 Circuit 30, main power input Key in steering lock pos 1 12 VDC or no

key

>inserted, open door 12 VDC Feed from F1fE

>2.3 Circuit 15R/30 fused power inputswitched from CF relay module 12 VDC

>with key in steering lock pos. 1 Feed from F1f4

>2.4 Circuit 30, main power input same as pin 2.2 Feed from F1fF

>4.1 Left seat proximity signal output low side

>4.2 Left seat proximity signal input Connector 4 unplugged Measure across

>pin 4.1 & 4.2 12VDC

>4.3 Left backrest lock signal output Measure to pin 2.1 > 4 VDC

>4.4 Left seat proximity signal output high side Pin disconnectedMeasure to

>pin 2.1 > 4 VDC

>4.5 Serial port data output, recalls mirror adjustment presettings from

>memory Remove connector 1 from ECMkey in steering lock pos. 1 press one of

>memory pos. buttons 4-7 VDC Note 1

>5.15.2 Rear raise/lower adjust motor power supply output Ignition on 12 VDC

>with s2 pushed in either direction (polarity reverses) Resistance0.5-15

Ohms

>5.3 Rear raise/lower pos. actual value reference input Measure to pin 5.4

>record value X thento pin 5.5 record value YAdd values X+Y = approx.

>2200Ohms

> 5.45.5 Rear raise/lower pos. potentiometerpower supply output low

sidepower

>supply output high side Measure across pin 5.4 & 5.5approx. 2200Ohms

>6.16.2 Front raise/lower adjust motor power supply output Ignition on 12

VDC

>with s3 pushed in either direction (polarity reverses) Resistance0.5-15

Ohms

>6.3 Front raise/lower pos. actual value reference input Measure to pin 6.4

>record value X thento pin 6.5 record value YAdd values X+Y = approx.

>2200Ohms

> 6.46.5 Front raise/lower pos. potentiometerpower supply output low

>sidepower supply output high side Measure across pin 6.4 & 6.5approx.

>2200Ohms

>7.17.2 Seat fore/aft adjust motor power supply output Ignition on 12 VDC

>with s1 pushed in either direction (polarity reverses) Resistance0.5-15

Ohms

>7.3 Seat pos. fore/aft actual value reference input Measure to pin 7.4

>record value X thento pin 7.5 record value YAdd values X+Y = approx.

>2200Ohms

> 7.47.5 Seat pos. fore/aft potentiometerpower supply output low sidepower

>supply output high side Measure across pin 7.4 & 7.5approx. 2200Ohms

>8.18.2 Backrest fore/aft adjust motor power supply output Ignition on 12

VDC

>with s5 pushed in either direction (polarity reverses) Resistance0.5-15

Ohms

>8.3 Backrest pos. fore/aft actual value reference input Measure to pin 8.4

>record value X thento pin 8.5 record value YAdd values X+Y = approx.

>2200Ohms

> 8.48.5 Backrest pos. fore/aft potentiometerpower supply output low

>sidepower supply output high side Measure across pin 8.4 & 8.5approx.

>2200Ohms

>9.19.4 HR raise/lower adjust motor power supply output Ignition on 12 VDC

>with s4 pushed in either direction (polarity reverses) Resistance0.5-15

Ohms

>9.3 HR raise/lower pos. actual value reference input Measure to pin 9.2

>record value X thento pin 9.5 record value YAdd values X+Y = approx.

>2200Ohms

> 9.29.5 HR raise/lower pos. potentiometerpower supply output low sidepower

>supply output high side Measure across pin 9.2 & 9.5approx. 2200Ohms

>N32/2

>

>1.1 Coded voltage input, activates functions selected by S92 s5/s8/s9

>Measure to pin 1.4 approx. 2200 Ohms Note 1

>1.2 Coded voltage input, activates functions selected by S92 s3/s4/s7

>Measure to pin 1.4 approx. 2200 Ohms Note 1

>1.3 Coded voltage input, activates functions selected by S92 s1/s2/s6

>Measure to pin 1.4 approx. 2200 Ohms Note 1

>1.4 Right front power seat switch group power supply output Ignition on 5

>VDC

>2.1 Main ground to W19 Approx. 0 Ohms to ground

>2.2 Circuit 30, main power input Key in steering lock pos 1 12 VDC or no

key

>inserted, open door 12 VDC Feed from F1fE

>2.3 Circuit 15R/30 fused power inputswitched from CF relay module 12 VDC

>with key in steering lock pos. 1 Feed from F1f4

>2.4 Circuit 30, main power input same as pin 2.2 Feed from F1fF

>4.1 Right seat proximity signal output low side

>4.2 Right seat proximity signal input Connector 4 unplugged Measure across

>pin 4.1 & 4.2 12VDC

>4.3 Right backrest lock signal output Measure to pin 2.1 > 4 VDC

>4.4 Right seat proximity signal output high side Pin disconnectedMeasure to

>pin 2.1 > 4 VDC

>4.5 Serial port data output, recalls mirror adjustment presettings from

>memory Remove connector 1 from ECMkey in steering

>

>lock pos. 1 press one of memory pos. buttons 4-7 VDC Note 1

>conn. 5-9 refer to appropriate information from N32/1as listed above

>Note 1 For further test refer to DM Body and Accessories Vol. 4 15.1

>

>

>

>Designation Description Coordinates Reference

>

>A1  Instrument cluster 38L PE54.30

>F1  Fuse and relay box 2L

>40G

>45L B.4

>F1f4 Fuse 4 43G

>F1f6 Fuse 6 41G

>F1f8 Fuse 8 40G

>F1f9 Fuse 9 42F

>F1f12 Fuse 12 42F

>F1fE Fuse E 1K

>45K

>F1fF Fuse F 2K

>46K

>K24  CF relay module 41L

>M27  Left front ESA motor group (with memory) 7L

>M27m1 Fore/aft motor 8L

>M27m2 Rear raise/lower motor 13L

>M27m3 Front raise/lower motor 11L

>M27m4 Head restraint raise/lower motor 4L

>M27m5 Backrest fore/aft motor 6L

>M28 Right front ESA motor group (with memory) 61L

>M28m1 Fore/aft motor 62L

>M28m2 Rear raise/lower motor 58L

>M28m3 Front raise/lower motor 60L

>M28m4 Head restraint raise/lower motor 67L

>M28m5 Backrest fore/aft motor 65L

>N32/1  Left front ESA control module (with memory) 4A

>12A

>20A

>28A

>36A

>N32/2 Right front ESA control module (with memory) 46A

>53A

>61A

>67A

>N32/5 Left seat proximity control module 24L

>N32/6 Right seat proximity control module 47L

>N32/7 Left backrest lock safety package 28L

>N32/8 Right backrest lock safety package 36L

>49L

>N32/9 MSC control module (with memory) 44L

>S17/3  Left front door switch 25L

>S17/4 Right front door switch 50L

>S52/1 Left backrest lock switch (left seat) 32L

>S52/1x1 Left backrest lock switch connector (left seat) 31J

>S52/2 Right backrest lock switch (left seat) 30L

>S52/2x1 Right backrest lock switch connector (left seat) 30J

>S52/3 Left backrest lock switch (right seat) 33L

>S52/3x1 Left backrest lock switch connector (right seat) 33J

>S52/4 Right backrest lock switch (right seat) 34L

>S52/4x1 Right backrest lock indicator switch connector (right seat) 34J

>S91 Left front ESA switch group (with memory) 17L

>S91e1 Illumination 20L

>S91s1 Fore/aft switch 15L

>S91s2 Rear raise/lower switch 15L

>S91s3 Front raise/lower switch 17L

>S91s4 Head restraint raise/lower switch 17L

>S91s5 Backrest fore/aft switch 19L

>S91s6 Memory button 1 switch 14L

>S91s7 Memory button 2 switch 16L

>S91s8 Memory button 3 switch 18L

>S91s9 Memory store button switch 18L

>S92 Right front ESA switch group (with memory) 54L

>S92e1 Illumination 52L

>S92s1 Fore/aft switch 56L

>S92s2 Rear raise/lower switch 57L

>S92s3 Front raise/lower switch 55L

>S92s4 Head restraint raise/lower switch 55L

>S92s5 Backrest fore/aft switch 53L

>S92s6 Memory button 1 switch 57L

>S92s7 Memory button 2 switch 56L

>S92s8 Memory button 3 switch 54L

>S92s9 Memory store button switch 53L

>W1  Main ground (behind instrument cluster) 41H

>W18 Ground (left front seat crossmember) 2E

>21H

>27E

>W19 Ground (right front seat crossmember) 46E

>49G

>50G

>X4  Terminal block (circuit 30, fuse and relay box) (2-pole) 39J B.1/4

>X6 Terminal block (circuit 58d) (2-pole) 23E

>51C B.1/4

>X11/4 Diagnostic test clutch 41F B.1/5

>B.1/15

>X18 Interior/taillamp harness connector (12-pole) 38F B.1/4

>X18/3 Interior/taillamp harness connector (8-pole) 42F B.1/4

>X54/6 ESC connector (2-pole) 43H B.1/4

>X55/3 Left front seat connector block 30G B.1/2

>X55/4 Right front seat connector block 33G B.1/2

>Z21/10  Door contact connector sleeve (switched ground) (solder joint in

>harness) 51E

>Z81/4 Circuit 58d connector sleeve (FFS) 22E

>52E

>*U27 15.00

>Electrical system, engine 0

>*U34 82.20-2000

>Interior lighting 0

>*U94 91.59

>Roll-over bar 0

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>-----Oorspronkelijk bericht-----

>Van: r129list-bounces at mbcoupes.com

>[mailto:r129list-bounces at mbcoupes.com]Namens mooncusser

>Verzonden: dinsdag 10 april 2007 18:57

>Aan: r129list at mbcoupes.com

>Onderwerp: [R129 SL] schematic request

>

>

>Hi all,

>	I need wiring schematic of electric seat system for my 300sl.

>It seems possessed... switches don't work and it moved all most all

>the way forward on day while driving. And it has not moved since. The motor

>is working... or it wouldn't have acted like "Christine" that day I was

>driving. Any suggestions????

>The MB Coupes Website!

>R129 SL Mailing List

>

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