My driver's side power seat will move forward when I push the button back. All the other adjustments work well. The only way I can get the seat to move back is by using one of the seat memories. Does anyone have any ideas on how to fix this. Do you think I will need a new power seat switch?

 

If you need a new power seat control (with steering & memory), let me know. I have one extra.

You may want to check out the power seat controller (under the driver seat). If that stuff malfunction, it'll cost you lot of money

 

Thanks for the offer. I assume that it must be the power seat control in the door since the seat itself will move back when I hit the appropriate memory button. I'll keep you in mind if I decide to replace the power seat control. Is the seat and steering wheel control just one piece? Thanks

 

Well, someone e-mailed me an article in Star magazine about malfunctioning seat switches. It gave a step by step tutorial about fixing the switch. Basically, a spot of sodder breaks and has to be resoddered. Easy fix. Took me about an hour to do, most of which was removing and replacing the door panel. I replaced my bad door strap while I was in there.

 

Please post it up to Help Others!

 

This switch is a common problem on W210s. The last issue of the Mercedes Club's magazine had an article on the repair of these switches. Basically, you remove the switch assembly (the whole thing looks like a "black box" with a green circuit board on the back) from the door panel. Then, pop the black plastic cover off of the circuit board. Find all the lead pins from the lower seat cushion switch (the one that moves the seat forward and backward) where they are soldered to the board. Since this switch gets pulled-on the most, the resulting slight flexing of the pins tends to loosen the solder joints over time, causing all manner of weirdness in seat operation. The solution is simple: just dab a little resin flux on each solder joint and then reheat each joint with a soldering pencil! According to the magazine, this should solve the vast majority of seat switch problems in the W210. Of course, all this assumes that your problem IS a switch problem. Good luck...

 

yes post it up, i just had a problem with the passenger side...... everything works execpt the back part goes down but only comes up a little bit..........

 

hey i have the same problem seat will move forward when i am pushing back on drivers side and I have to use seat memory to get back!

 

I had the same problem twice. However, this is how I could have remidy the situation.

1) Get out of the car and leave the driver side door open
2) Move the power seat all the way to the front using the seat switch (have to move completely to the front)
3) Now it should work like before

Hope this will help!

some reason, it seems the procedure reset the problem. Mine is 2K and it seems there are few minor electrical problems here and there.

 

Thanks for your collective info on the seat switch problem I've got the same issue with fed/back control.

I also have a problem with the head rest not lowering unless assisted with a push - the motor drives, you can her it run, but the head rest does not lower.

Can anyone offer help on head rest drive problems?

 

I just want to add that I have an E430 and that my drivers side power seat switch was not working well . I could move forward but not backward except with the preprogrammed memory buttons . I fixed it by opening the drivers side door and moving the seat forward all the way to the end . It fixed the problem

 

i tried this out last night by moving the seat back to the end and then to the front and nothing..........everything else works but the seat doesn't come up after a certain point?


any help would be great.....

 

If anyone needs the instructions from the article in Star, send me a private message by clicking on my username and I will e-mail it to you.

 

Had same problem with back rest lever, fixed, however i had to move the seat all the way forwaed AND all the way back to the limits.

 

This is the process to resync the front seats. It should always work for the backwards switch problem.

 

seat move button bulb does not light

 

I had the same issue with my 1995 R129. Seat not moving backward unless I use a memory button. No magic solution here, just bad connections on the circuit board. Unlike other seat switches the ones on this vintage do NOT let you access the green circuit board back. The 6 pins that are for the connector are secured to the housing and spot welded to the circuit board (TINY spot welds).
As mentioned earlier the problem is with soldered connections between the individual switches and the circuit board. Re-soldering will solve the problem usually (did with mine - the first time several years ago) This time, however, I had to install a jumper wire from the switch soldering point (on the back of the board) to the resistor solder point. (ever wonder how 6 pins control 10 motion functions, memory set, 3 memory positions and lighting? Each pin controls numerous functions as each funciton -say, back and forth of seat- has a different voltage sent to the controller as a result of the resistor it passes through - Clever!)

To access the back of the board to re-solder you must CAREFULLY cut away the grey plastic housing above the area of your switch in question. The grey housing cannot be removed due to the pin mounting. There is a small gap between the board and the grey plastic but take your time so that you do not plunge through and damage the circuit board. The problem will likely not be obvious so just re-solder all the connections for your problem switch.

The fact that all the seat functions work when using memory pretty much negates a controller problem. Also, since only one function is lost (for mine it was seat moving backward) negates a wire in the harness or a connector being the problem (as each wire has multiple functions). All that is left is a switch issue where a signal is not being sent to the controller.

Hope this helps.