Date registered: May 2009
Vehicle: 1982 300SD, 1984 380SL, 1997 E320, 2008 R350
Location: Redondo Beach, Ca
Mentioned: 0 Post(s)
Quoted: 17 Post(s)
1997 E320 Door Control Module location. Or is it relays?
Following an extensive search on this forum I failed to find an answer to where might a driver's DCM for my '97 E320 be located. It is not behind the door panel as some have suggested. My door window will roll down only once, just after I start the car. After that, I can roll it up but it will fail to roll down again. I replaced the lower center console switches assembly about two years ago, after which the problem went away, but is now back. I know it is not the motor, because it will operate in either direction if I take apart the motor connector and swap places the heavy gauge wires. I can also hear a click, as if it was a relay somewhere trying to work when I hit the window down button.
Is it possible that my particular model does not have a dedicated DCM and its functions are built into some other unit? Or is it possible the DCM is located elsewhere? I am certain the light gauge wiring coming out of window switches are not directly fed to the window motor, because the two wires going to it are of a much heavier gauge. There are no relays in a battery bay under the rear seat. But I am suspecting there have to be four pairs of relays if there are no DCMs. The question then is where might they be located?
Last edited by dragonflyer; 09-30-2012 at 11:50 PM.