VIPclk320

I really have no idea on your question. i had the same issue and i bought a new control module and problem was gone. i purchased new seats for my car in a different color so thats how i'm left with two seat control modules that i'm willing to sell if the price is right. let me know i have the driver and the passenger side i have been keeping them as backups but again if the price is right i let it go.

sidvicious

http://search.digikey.com/us/en/prod...NCT-ND/1557896

johnsebik

I have recently been having problems whenever I am idle, going in reverse and overall driving. The car feels like it is going to stall as I come to a stop, when i start to go in reverse etc. I had my mechanic use his scanner to plug into under under the dash and no read at all. the screen would not turn on? Does this mean my ecu is dead? electrical problems?

kalvina

I just ordred some of these and will post back when I install them. Now i have to figure out how to take the bolts out when the seat is all the way back....

Also thanks sidvicious for the link

Jim_p

If you can get the two bolts from cushion out at the front corners the cushion flips up and you access the control module. They are torxs bolts that connect the seat tracks to the seat cushion.
-Jim

miatawnt2b

on the passenger side I lost the bottom rear tilt, and a few months later lost the front/back control. All other controls on the seat work properly. I can hear the relay click when the switch is moved. I've also verified the motors are good by moving them to a different position on the controller.

So I think I need a controller. I pulled it apart, and the transistor listed in the thread is not burned, no traces on the board damaged. I do however hear the relays rattling quite a bit when i rock the controller back and forth.

So. Does your controiler rattle? If the transistor mentioned blows would all seat function cease or is ip possible to loose just a few functions.

I'm wondering if I need the transistor, relays, or just a new controller.

sedefcha

All relays rattle: they are OK.
My seat dosen't move back/forward neither when I flip, nor from the switch. Motor is working with direct voltage to the pins of the connector
I'll replace the IC and will post what happened

cindyclk

I'm assuming that you have checked all three motors. The middle motor is the for/aft motor.
Also, you have checked the trunk fuses......a lot of people in this thread are jumping to new modules etc before doing basic motor/fuse checks.

sedefcha

Fixed: lubricant from the reductor penetrated inside the motor and covered brushes and rotor. Cleaned it and everything works.
I made some pictures if someone is interested, but it is a simple job.
Before removing the motor I spend 4 hours in electrical checks, because seat was moving by putting 12V to the blue and white wire. When i plug it in the control unit only the relay was clicking... Strange thing is that this is three brush motor. All other are normal 2 brush motors. The signal for position comes from a Hall sender inside the motor
Is the motor a spare part, or they sell whole seat frame?

EDIT: First speed is from the switch on door, second speed is triggered when you flip seat. PN of motor is 208 820 0842 and price here in Bulgaria (Europe) is around 150 euro.

cindyclk

In US $135 US dollars
https://www.getmercedesparts.com/oem...des-parts.html