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Discussion Starter #1 (Edited)
Hello. I have a 1997 Mercedes C230(w202). I've been reading a lot about an issue that I am also having regarding my power windows. I've read EVERYTHING and I have not seen anything regarding the specific issue I'm having. Both driver and passenger front windows stopped working and won't come back up. I know you may have answered questions like this, time and time again, but after research, I haven't found an answer to my issue. I'm aware that the windows work on a network and if a problem occurs, it's because of the rear windows. I've checked fuses and all are good.

Last night, I removed the door panels from both rear doors, removed all connections and disconnected the battery for 2 hours. Upon reconnecting only the battery(leaving the rear doors mechanisms fully disconnected), my front windows were still unable to go up or down. I've done the simple test to see if the front window motors were the issue by seeing if the interior lights dim while the window switch is activated, and they didn't. Also, when the car is in the accessory position(before starting the car), and I try to roll the front windows up or down, I hear something(which sounds like it's in the trunk) clicking. When I press either front window up or down, I here a click. I'm not sure if there's a rear module trying to engage, but I'm anxious to know if you've heard of this issue. I would greatly appreciate your response. Thank you


FYI, I'm not a novice, I put a new engine in this car by myself a couple years back, but this issue is something new to me. Thanks



EDIT: I found out where the clicking is coming from, it's the "Window Comfort Switch" that's hidden by the battery in the trunk underneath the metal, but accessible when the battery is removed. The rear windows still work fine, but is there a fix to the "Window Comfort Switch" that will stop the clicking when the front window buttons are activated, so the windows will work?
 

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Discussion Starter #2
Ok. So I installed the new “Window Comfort Module”, but the front windows still weren’t working, only the back windows. Basically, the “Window Comfort Module” wasn’t the issue, so I re-installed my old one. Just to scrutinize a bit more, I opened my Window Comfort Module to find 8 “Copper Magnetic Mechanisms” (2 for each window, 1 for the window up and 1 for the window down). When I engage the windows, to roll them up or down, the corresponding “Copper Magnetic Mechanism” engages normally within the Window Comfort Module, but the front windows are not rolling up or down.

Now since the window switches (in the console) are still engaging the “Copper Magnetic Mechanisms” in the Window Comfort Module, the window switches can’t be the issue right? My understanding is there can only be 3 reasons on why only the front windows aren’t working….

1) The Window motors are bad.
-But how can both front window motors go out simultaneously? Also, I did the simple window motor test. Having all the interior lights on and trying to roll the front windows up & down, which is supposed to make the lights “dim” if the window motors are the issue, but the lights didn’t dim.

2) The Window Comfort Module is bad.
-Clearly I replaced it, but the same exact problem was happening when my old Window Comfort Module was in… Which was… only the rear windows were working.

3) The Window Switch(in the Console) is bad.
-If this was the issue, why are the window switches still activating the “Copper Magnetic Mechanisms” inside the Window Comfort Switch… Is this even possible when the window switches go bad?


As you can see, I’m at a loss about the issue and winter is coming. I tried to be thorough in my response, so let me know if any of you need clarity on something. Thanks
 

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This may be a long shot but are you aware the window switches have two positions and if the window mechanism has not been reset after a battery disconnection can cause some confusion.
Try pressing the window switches to a 'first' position. If you do get operation then you need to reset your windows buy allowing them to go fully up and holding the switch on for a couple of seconds.

A long shot - I know - I got confused after my car had been returned a I couldn't get my window up after lowering it. Resolved by manual !!

Joe
 

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This may be a long shot but are you aware the window switches have two positions and if the window mechanism has not been reset after a battery disconnection can cause some confusion.
Try pressing the window switches to a 'first' position. If you do get operation then you need to reset your windows buy allowing them to go fully up and holding the switch on for a couple of seconds.

A long shot - I know - I got confused after my car had been returned a I couldn't get my window up after lowering it. Resolved by manual !!

Joe
Thank you for your help. As it turns out, there was the coinciding "Window Comfort Module" Fuse in the rear fuse box that I had visually inspected, but I didn't pull it out to get a thorough view of it. The fuse didn't actually break the link between itself(As it's supposed to do), but it actually melted by one of the prongs! So I put another 30Amp fuse in & now I'm back in business! Thanks again for your help!!:thumbsup:
 
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