good morning, I have a problem with battery drain overnight. I believe I have narrowed it down to the drivers seat control module (I unplugged it for several days and did not have the battery drain overnight). Before replacing it, I wanted to know if the seat control module could also cause my sunroof to not work properly (the roof will not "one touch" open, I have to continuosly press the open switch and it goes about an inch each time until open. Also, when I close the sunroof, it goes all the way past closed and "pops open" then will not close.)

I know the seat and roof are both going through the rear SAM in the left rear of the trunk (according to the wiring diagrams). Can the seat control module affect dthe roof or is it the SAM?


Thanks. Alan

 

Your sunroof will have to be reset with the (open/close) switch. This was probably caused by your battery voltage dropping or being drained. To reset, keep closing the sunroof untilit reaches the closed positon. Then open to the sunroof to the pop-up position. Then "hold the button" in this position for5 to 10 seconds. This should reset the sunroof back to the "one touch" settings. Hope this works for you.

 

yeah. tried that already about a dozen times. no luck. guess i'll change the module tomorrow and then try to reset the roof again after that.

 

hi, i need some info about SAM module, i exchange battery and now elec. seats, wipes, alarm, window not working. my question is that i need new Sam module or need just reset??
thenks

 

You probably took care of the problem but for new people with this problem, there is a very simple fix that involves cutting one wire from the plug and splicing it into another one. The plug I'm referring to is the one that goes into the seat at the bottom. Basically, the defective module is drawing power even when the engine is off. There are two positive and one ground (3 wires) in the plug. Cug the ont that is positive when the engine is off. Cap off the end that goes to the battery / electronics. Splice the end that goes to the seat controller with the positive wire that is on only when the engine is started. The wire you cut allows the seat to be used a few minutes after / before the car is started and is a convenience feature. I don't care if I lose this feature and especially for an extra $450 per seat I con't care even more.

I found this fix on the Web and wanted to pass it along to folks who have the same problem with the seat module and battery draining.

 

2001 C240. Seat control module drains the battery in 2-3 days. I looked underneath the seat and found a bunch of plugs. 4 in the back and 2 or 3 in the front. Which ones do I disconnect? Someone mentioned here that you can splice a wire that is for keeping the seat control on after the car if off, and that should fix the problem. Either way I am completely lost. Any pictures of the steps needed or diagrams would help.

davidanthony21@yahoo.com

 

Same problem :/ Pictures?

 

i have c c240 2002, 75000 miles i have many problems:
1- i should hold the accelaration pedale more than 30% to have a response but when i use the tiptronic the pedal response immedialtly. is this problem due to a bad MAF?
2- the mpg is not very well, is between 15-16 in city and 25 highway, why this difference?also the mpg very bad when the road is up.I don't have any problem.i went to a mercedes shop, they told me taht everything is ok
3- the driver back seat don't function always.
4- i have a problem in the lock of driver's door, when i open/close tha car, the lock go up and down many.can i repair it instead of replace it?


thank you

 

I have 2005 C-240 with about 11,900 miles on.

I had B-service about two weeks ago, and they also changed the battery.

yesterday when I tried to change the driver's seat settting, the headrest and recline don't' work at all but the seat moves front and back.....and everything else is working okay.

Today I brought the dealer, and they told me that they have to change the module.

Since I live in Hawaii, I have to wait about one week.....and the estimate is about $1,100(including the labor, $125 per hour).
I hope that they can fix alright and in perfect!?