Parts Catalog Accessories Catalog Tech Info Tech Forums
  Search our site:    
 Cart  | Project List | Order Status | Help    

Go Back   PeachParts Mercedes ShopForum > Technical Information and Support > Tech Help

LinkBack Thread Tools Display Modes
Old 03-09-2002, 12:30 PM
Registered User
Join Date: Apr 2000
Location: eastern NC
Posts: 149
power seat won't raise

My passenger front seat will neither raise or lower.The seat appears to be bottomed out. I can hear the motor engaging but nothing is happening. All other seat functions work. I loosened the seat and notice that the cable for the elevation jumps around when the lever is pressed but the seat does not lift. Is it possible that the cable is worn out? How difficult is this to replace? It turns freely at the motor. I tried to screw it in but the other end prevents me from tightening it. Any thoughts would be appreciated. I searched the history file but found nothing pertinent. Thanks.

1985 380 SE 203K
Reply With Quote
Old 03-09-2002, 06:35 PM
Join Date: Nov 2001
Location: Cape Cod Massachusetts
Posts: 1,427
Power Seat Drive!

I don't know if it is similar to my 87SDL seat operators, but inside the thick black cable that runs from the electric motor to the seat frame there is a flexable shaft. The shaft is hardend steel and looks like a spring that has been compressed from its' original round shape to a square shape. The easiest way to work on this is to remove the entire seat and then flip it over gaining access to the motors. Four 10MM bolts hold the seat to the floor pan one at each corner, you may have to move the seat forwards or back to get access. Plastic trim covers have to be removed first. A 10 mm gearwrench with a 5 degree swing makes the rear bolts easier to get out. Once you've got the bolts out you've got to disconnect the electrical connectors at the front of the seat, you grab the carpeted trim piece and pull it forward to release it and lift it upward the connectors are underneath. Disconnect the battery to be safe if you don't want to short anyhing out! Pry up the connections.

Lift the seat out of the car and invert. You can undo the springs that hold the carpeted trim cover and remove it out of the way. You then need to loosen the bolts holding the motors to the frame on one side and (on my SDL) the memory box on the other side freeing up the motors.I had to unscrew the six philips head screws that hold the motors to the frame holding the cable housings, then I was able to pop of the C-clips retaining the black cable housings freeing them. You may be able to release the C-clip retaining the flexable cable housing without disassembling the motor frame if your lucky. If you can do that pull the cable housing free of the motor and you can grasp the flexable steel shaft and remove it. If its broken into multiple pieces you can try to get the piece out with a magnet or most likely you will have to go to the other end of the cable housing and using a pair of pliers compress and release the sping clip holding the cable housing to the geared frame mechanism, this is a strong clip. Pull the flexable shaft broken piece free or push it through and out.

I had gathered a couple of spare flexable shafts at the junk yard when I got a new seat spring frame. You may be able to buy them new from Fastlane or you can get them from a salvage operation I seem to remember seeing them somewhere for $18 or $20. You then replace these shafts and reassemble in reverse order.

Reply With Quote
Old 03-09-2002, 07:40 PM
Registered User
Join Date: Apr 2000
Location: eastern NC
Posts: 149
Thanks, BB. Very clear instructions. That has to be my problem..broken cable.
Reply With Quote


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

Similar Threads
Thread Thread Starter Forum Replies Last Post
how heavy is power seat? ktlimq Open Discussion 2 02-04-2004 10:44 PM
power seat blowing fuse domchang SL Forum 3 08-30-2003 07:51 PM
Audi Power Seat Question Help Benz84 Tech Help 4 06-04-2003 10:20 PM
Power Seat INOP....Wiring problem agood Tech Help 1 04-27-2003 10:27 PM
190E 2.3, 1987 Power seat problem sidhu Tech Help 0 01-03-2001 08:04 AM

All times are GMT -4. The time now is 01:18 PM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2016, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2011 Pelican Parts - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page