Well, I have a new problem with my 1998 C230. My drivers side power window won't operate. But, if I disconect the battery it re-sets something and I get 5 to 10 operations before it quits again. Has this happened to anyone else? Any help would be greatly appreciated!

Thanks,
Matt

When it quits, do you have power in the wiring harness to the motor? The window switch?

Tim

The 1998 & later C-class have an interior CAN(computer) network. Each door has a control module! ON the rear the module is part of the window motor! Even the window switch is a computer!

THEY can be a problem to diagnose as one of the working modules can cause others on the network to go down! SCAN the system as upto 10 computers share that interior network!

__________________
MERCEDES Benz Master Guild Technician (6 TIMES)
ASE Master Technician
Mercedes Benz Star Technician (2 times)
44 years foreign automotive repair
27 Years M.B. Shop foreman (dealer)
MB technical information Specialist (15 years)
190E 2.3 16V ITS SCCA race car (sold)
1986 190E 2.3 16V 2.5 (sold)
Retired Moderator

Up to 10 computers? Who would think power windows would require so much technology (sarcasm). These things must be murder to troubleshoot for the pros. My local dealer told me today that there is "an intermitent signal problem with the control module." I am getting tired of emptying my wallet at the dealer. My intention now is to attempt to bypass the technology. I intend to find a hot wire at the fuse box, and use a switch out of an older car. DOes anyone know if this will cause me any unforseen trouble?

As allways, many thanks.

Matt

OF course trying to do that willl be next to impossible!! There isn't any wiring to support direct operation of that system.
EVEN the 1994-97 cars used a computer to operate the windows!

__________________
MERCEDES Benz Master Guild Technician (6 TIMES)
ASE Master Technician
Mercedes Benz Star Technician (2 times)
44 years foreign automotive repair
27 Years M.B. Shop foreman (dealer)
MB technical information Specialist (15 years)
190E 2.3 16V ITS SCCA race car (sold)
1986 190E 2.3 16V 2.5 (sold)
Retired Moderator

At this point, that does'nt surprise me. Thanks for the heads up, probably saved me an afternoon of frustration. Any sugestions on what I should do next?

Matt

Actually not....the electrics in the door are seperate from the regulator...I wish there was a way to pull the picture from EPC net....it would explain allot.

The part number shows to be
A 210 820 76 26 - Control Unit Right

__________________
1995 E300 Diesel
1994 E320
1999 C230K
1994 S500 W140
1990 300 SEL

Well the motor and control are all one piece and are removable from the regulator as I said. I did not know you could buy the motor separately though.

__________________
1998 C230 330,000 miles (currently dead of second failed EIS, yours will fail too, turning you into the dealer's personal human cash machine)
1988 F150 144,000 miles (leaks all the colors of the rainbow)
Previous stars: 1981 Brava 210,000 miles, 1978 128 150,000 miles, 1977 B200 Van 175,000 miles, 1972 Vega (great, if rusty, car), 1972 Celica, 1986.5 Supra

MBDOC is right, unplug one or both rear door motor/modules and the fault will clear. they fail and drag the CAN down causing issues with front door and overhead control panel modules plus are super expensive.

I'm trying to decide on second hand or new ones.

__________________
Turbo 202 history:
http://www.cardomain.com/ride/735658

FWIW the used one I bought over 7 years ago is still working.

__________________
1998 C230 330,000 miles (currently dead of second failed EIS, yours will fail too, turning you into the dealer's personal human cash machine)
1988 F150 144,000 miles (leaks all the colors of the rainbow)
Previous stars: 1981 Brava 210,000 miles, 1978 128 150,000 miles, 1977 B200 Van 175,000 miles, 1972 Vega (great, if rusty, car), 1972 Celica, 1986.5 Supra

Just bought my wife a used '99 with same problem as OP. Indy mech says I need a driver's door module and wants crazy money for one. Is this what I need?

97 00 Mercedes W202 C220 C230 C280 Left Front Door Module Control 2088201326 | eBay

Is this right part number?

Thanks,
Scott

OK, I'm having this problem on my 2000 C230. The driver's window is inoperative. If I disconnect the battery, it will work for a day or two then won't work again. If I understand what's being said here, it may be a problem with a window other than the driver's side. Can I just pull the fuses for the other windows to see which one is causing the problem?