Need Advise/Help
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Joined: Feb 2010
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From: Bolingbrook Illinois
1999 C43 Amg
Need Advise/Help
It seems my electrical is going bad.
When I press and hold the remote key to lock or unlock to bring all windows down or up. It won't work, it will unlock the doors but not lower the windows?
I just installed a brand new battery and still won't work.
Yesterday the drivers window and passenger side window won't work up or down. I have to remove the negative cable from the battery for 20 seconds and that makes both windows work for a couple of days than they stop working again.
I had this problem before with just the passenger side window not working but now both front windows are doing this?
Why does taking off the battery cable make them work??
I replaced all fuses and relays with Oem parts and still have this issue.
Any help is greatly appreciated.
When I press and hold the remote key to lock or unlock to bring all windows down or up. It won't work, it will unlock the doors but not lower the windows?
I just installed a brand new battery and still won't work.
Yesterday the drivers window and passenger side window won't work up or down. I have to remove the negative cable from the battery for 20 seconds and that makes both windows work for a couple of days than they stop working again.
I had this problem before with just the passenger side window not working but now both front windows are doing this?
Why does taking off the battery cable make them work??
I replaced all fuses and relays with Oem parts and still have this issue.
Any help is greatly appreciated.
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From: Bay Area, CA
98 C43, 15 Alfa 4C LE, 18 Tesla Model 3 DM Perf, 08 Duc S1000, 02 Duc 998, 98 Duc 748, 01 Miata
Every time you disconnect the battery, you reset all of the 'smart' systems in the car, which includes the windows, sunroof, and I believe the locks. You can look in your manual for how to reprogram or reset these systems. I don't remember off the top of my head what the process is, but something to the effect of hold the window close button down for 10 seconds, etc. When I disconnected my battery, the ability to press the button and make the windows go down even with the button released was lost. The system eventually relearned it. This may not be your issue, but something to investigate.
Thread Starter
MBWorld Fanatic!
Joined: Feb 2010
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From: Bolingbrook Illinois
1999 C43 Amg
Thanks. To reprogram the windows you lower each one a little than raise up and hold for 2-3 seconds. Same with sunroof.
But what I want to know is WHY does the front windows always start to work after a reset of the battery? Than after a day or two they stop working. Than do the reset and they work than after a day or two they stop working, know what I mean?
This problem is making me want to get rid of the car. Electrical problems I do NOT know how to fix. Anything else I can do myself, this is so annoying...
But what I want to know is WHY does the front windows always start to work after a reset of the battery? Than after a day or two they stop working. Than do the reset and they work than after a day or two they stop working, know what I mean?
This problem is making me want to get rid of the car. Electrical problems I do NOT know how to fix. Anything else I can do myself, this is so annoying...
MBWorld Fanatic!
Joined: Apr 2006
Posts: 1,101
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From: Bay Area, CA
98 C43, 15 Alfa 4C LE, 18 Tesla Model 3 DM Perf, 08 Duc S1000, 02 Duc 998, 98 Duc 748, 01 Miata
It works when you unhook the battery because you reset everything. As for why it stops working after a few days, I don't know. I'm not very well versed on the electrical side of things. Hopefully one of the techs will be able to chime in.
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Joined: Aug 2006
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From: A.D., U.A.E
2000 (W202 C200) & 2000 (W202 C55)
It seems my electrical is going bad.
When I press and hold the remote key to lock or unlock to bring all windows down or up. It won't work, it will unlock the doors but not lower the windows?
I just installed a brand new battery and still won't work.
Yesterday the drivers window and passenger side window won't work up or down. I have to remove the negative cable from the battery for 20 seconds and that makes both windows work for a couple of days than they stop working again.
I had this problem before with just the passenger side window not working but now both front windows are doing this?
Why does taking off the battery cable make them work??
I replaced all fuses and relays with Oem parts and still have this issue.
Any help is greatly appreciated.
When I press and hold the remote key to lock or unlock to bring all windows down or up. It won't work, it will unlock the doors but not lower the windows?
I just installed a brand new battery and still won't work.
Yesterday the drivers window and passenger side window won't work up or down. I have to remove the negative cable from the battery for 20 seconds and that makes both windows work for a couple of days than they stop working again.
I had this problem before with just the passenger side window not working but now both front windows are doing this?
Why does taking off the battery cable make them work??
I replaced all fuses and relays with Oem parts and still have this issue.
Any help is greatly appreciated.
ZAYED,,
Thread Starter
MBWorld Fanatic!
Joined: Feb 2010
Posts: 1,506
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From: Bolingbrook Illinois
1999 C43 Amg
Today both of my remotes would not unlock or lock the doors. Batteries on the remote are brand new. So I disconnected the battery for 20 seconds and the car started to read the remotes and both remotes now opens and closes the doors. What is going on?..
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From: Canada
eclectic assortment of cars
If memory serves, the comfort relay is in the trunk, underneath the floor carpet. You have to remove the carpet to get at it. But I thought that relay only had to do with the power seats?
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Thread Starter
MBWorld Fanatic!
Joined: Feb 2010
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From: Bolingbrook Illinois
1999 C43 Amg
And my seats work just fine. Last year I did have problems were the seats didn't want to work, I installed a new relay and not problems after that.
Thread Starter
MBWorld Fanatic!
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From: Bolingbrook Illinois
1999 C43 Amg
As i remember; the Comfort Module located in the right side behind the Battery area....!!
Attachment 248487
ZAYED,,
Attachment 248487
ZAYED,,
MBWorld Fanatic!
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From: Land of mountains, cheese, chocolate and watches
12' W204 C63 AMG coupe "T-Rex", 12' W451 Smart Fortwo Pulse (99' W202 C43 AMG + Ultima Can-Am sold)
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1999 C43
As i remember; the Comfort Module located in the right side behind the Battery area....!!
Attachment 248487
ZAYED,,
Attachment 248487
ZAYED,,
Thread Starter
MBWorld Fanatic!
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From: Bolingbrook Illinois
1999 C43 Amg
Zayed (and others) I looked for that module you posted zayed and it is not by the battery or any place in the back. I took off the carpet and plastic cover near the rear of the back seats. I also looked under both front seats and did not find that part. Any other suggestion where else it might be?
Do we have one for SURE on our c43's?
Do we have one for SURE on our c43's?
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From: A.D., U.A.E
2000 (W202 C200) & 2000 (W202 C55)
I don’t have that Module in my car, but my friend C43 has it in the same place i mentioned before,
It depends of the spec. & model of the car,,
You may had "2" Relays,
One for the (Comfort Relay), #: "001 542 78 19", and the other one for ta (Window & Seat) adjustment #: "002 542 22 19" ,
You have to check how many Relays you have in the Trunk (under the carpet).....
http://blogs.yahoo.co.jp/moony_murmur/133582.html
https://mbworld.org/forums/c36-amg-c...eal-quick.html
ZAYED,,
It depends of the spec. & model of the car,,
You may had "2" Relays,
One for the (Comfort Relay), #: "001 542 78 19", and the other one for ta (Window & Seat) adjustment #: "002 542 22 19" ,
You have to check how many Relays you have in the Trunk (under the carpet).....
http://blogs.yahoo.co.jp/moony_murmur/133582.html
https://mbworld.org/forums/c36-amg-c...eal-quick.html
ZAYED,,
Thread Starter
MBWorld Fanatic!
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From: Bolingbrook Illinois
1999 C43 Amg
Zayed, that makes much better sense because I donts have that module but do have relays. I have never replaced the comfort relay which is the one you wrote 001 542 78 19. I did a search and the round pins tell me that I did not replace that one. Now I just have to find it. I did replace the second relay you wrote which is under the plastic in the trunk (after removing the carpet the lactic cover is there...). So once I find the comfort relay and replace I will update stating if it fixed it or not.
Btw, a Mercedes mechanic told me that I HAVE to get the module that I had replaced on the door itself reprogrammed. He said that is why it works for a while after I disconnect the battery. After a while the computer miss reads it and shuts down.... Can that be the reason too?
Btw, a Mercedes mechanic told me that I HAVE to get the module that I had replaced on the door itself reprogrammed. He said that is why it works for a while after I disconnect the battery. After a while the computer miss reads it and shuts down.... Can that be the reason too?
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From: A.D., U.A.E
2000 (W202 C200) & 2000 (W202 C55)
I don’t think so,, it could be...?!!?
I prefer to replacing the "2" Relays in the same time, and spray a contact cleaner to the circuit & brush it with a soft brush, it may help either....
ZAYED,,
I prefer to replacing the "2" Relays in the same time, and spray a contact cleaner to the circuit & brush it with a soft brush, it may help either....
ZAYED,,
Last edited by cm60k; Dec 7, 2012 at 06:26 AM.
Thread Starter
MBWorld Fanatic!
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From: Bolingbrook Illinois
1999 C43 Amg
Junior Member
Joined: Jul 2012
Posts: 62
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1998 c43 amg
there are detents on the window switches too---i had that problem after my battery went dead, and I had to hold the windowswitch half way down, which allowed the window to roll down, released then held it halaf way down going up the , then did that to each window, then it was reset...got the tip from a mechanic at a merc dealer who had a merc cosworth 190....
Thread Starter
MBWorld Fanatic!
Joined: Feb 2010
Posts: 1,506
Likes: 130
From: Bolingbrook Illinois
1999 C43 Amg
there are detents on the window switches too---i had that problem after my battery went dead, and I had to hold the windowswitch half way down, which allowed the window to roll down, released then held it halaf way down going up the , then did that to each window, then it was reset...got the tip from a mechanic at a merc dealer who had a merc cosworth 190....
