S-Class (W140) 1991-1999: 300 SD, S 350TD, 300 SE 2.8, S280, 300 SE 3.2, 300 SEL 3.2, S320, S320L, 400 SE, S420, 400 SEL, S420L, 500 SE, S500, 500 SEL, S500L, 600 SE, S600, 600 SEL, S600L, 500 SEC, 600 SEC

please help guys,power mirror and power seats stop working

Old Aug 27, 2007 | 07:03 PM
  #1  
mbcrazy's Avatar
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1998 s320 is mine.Wife drives 2002 c32
please help guys,power mirror and power seats stop working

hi guys! can anybody help me,need some input please.my electric mirrors ,steering wheel regulation and power seats all of a sudden stop working all together,anybody knows what is it,fuses are ok so it must be something else.please let me know if you encountered same problem or just know these cars better.thanks again

Last edited by mbcrazy; Aug 28, 2007 at 03:34 AM.
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Old Sep 22, 2007 | 05:16 PM
  #2  
Joseph Keith's Avatar
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S320
My s320 did the same thing and I found that the wiring in the mirrors were missing the casings and were shorting out the system.
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Old Jan 2, 2008 | 02:11 AM
  #3  
RaceLab's Avatar
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97 S500 Mercedes and 95 240SX SE Nissan
I have the same issue, power seat, steering wheel and mirrors all dont work. Any idea what this could be? It all worked fine and now it stopped working.
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Old Jan 5, 2008 | 12:12 AM
  #4  
Benzojae's Avatar
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From: Sacramento,CA
1997 Blk s500 coupe,mods performance tuner chip,rentech airbox,255/35/20 all corners,35% bronze
Wink

i just had this problem a few days ago i changed my fuse in the fuse box in the engine bay it takes a 20 amp,even if it looks like the fuse is not poped change it anyway you would be suprised.
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Old Mar 22, 2010 | 12:47 PM
  #5  
carmbu's Avatar
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From: Fort Lee, NJ
1998 CL600, 1998 C230 2010 C350
I think I have the same problem. The short is being caused by the passenger side mirror. Is this an easy repair? I'm pretty sure the mirrors on the CL-class are the same as on the S-class.
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Old Mar 22, 2010 | 01:49 PM
  #6  
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05 SLK 350, 97 S420, 92 Jeep, 04 Kia, 28 Ford Tudor, 51 Ford F3, 01 Harley, 03 Harley
Originally Posted by carmbu
I think I have the same problem. The short is being caused by the passenger side mirror. Is this an easy repair? I'm pretty sure the mirrors on the CL-class are the same as on the S-class.
I had that problem, passenger side mirror on my S420. Took the mirror off, little tricky, then found the wire and taped it up. Fixed it and been good for a couple of years.
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Old Mar 22, 2010 | 11:40 PM
  #7  
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From: norcal
1996 S320 SWB, 1998 S600
My driver side mirror had a short in the heater, and took out a fuse. Both mirrors share a fuse with the climate blower.
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Old Mar 23, 2010 | 02:14 AM
  #8  
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1998 and 2002 SL 500, 2014 E550 Convertible
For all of them to quit working at one time...it's a fuse or short in the wiring. Fuse box in the trunk. Look at your owners manual for the exact location....a burnt fuse would be the easiest and cheapest! Looking at the fuse(s) does not always indicate a burnt one....replace them..unless you did already in which event...you have a short. Start unpluging the mirrors....one at a time....then replace a fuse and test to see it they work...if not...a short or the brain box is shorted out.

Last edited by benica; Mar 23, 2010 at 02:19 AM.
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Old Mar 20, 2013 | 11:07 AM
  #9  
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1996 S500
Brand New same problem

Originally Posted by benica
For all of them to quit working at one time...it's a fuse or short in the wiring. Fuse box in the trunk. Look at your owners manual for the exact location....a burnt fuse would be the easiest and cheapest! Looking at the fuse(s) does not always indicate a burnt one....replace them..unless you did already in which event...you have a short. Start unpluging the mirrors....one at a time....then replace a fuse and test to see it they work...if not...a short or the brain box is shorted out.
Hello guy's, I am brand newbian to the forum and hate to jump in like this but I just took pocession of a 1996 S500 with 130,323 miles. It is in great shape but after one use the power seats, steering column and side mirrors are not working. " They worked once and then done" . Previuos owner said he jsut replaced that fuse befor I purchased but out again already so more than likely a short. Passenger side mirror has a crack at the connection to the car so I am guessing short maybe there???? Also, can someone point me to the fuse for the front seats??
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Old Mar 20, 2013 | 04:16 PM
  #10  
carmbu's Avatar
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From: Fort Lee, NJ
1998 CL600, 1998 C230 2010 C350
I solved the problem on my '98 CL600 (w140) with the mirrors, seats,and steering adjustment failing every so often. It was definitely a problem with the passenger side mirror that would blow the fuse every single time I tried to fold the mirrors. Since the seats and steering adjustment were on the same fuse, they would also not work until I replaced the fuse. Anyways, I took it to my mechanic who specialized in Mercedes and confirmed that the sheathing in some of the wires inside the passenger mirror were damaged thereby causing the short. He charged about $95 to repair the frayed wires. It's been about 2 years and the fuse has not blown since.
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Old Mar 26, 2013 | 03:40 PM
  #11  
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1996 S500
Originally Posted by carmbu
I solved the problem on my '98 CL600 (w140) with the mirrors, seats,and steering adjustment failing every so often. It was definitely a problem with the passenger side mirror that would blow the fuse every single time I tried to fold the mirrors. Since the seats and steering adjustment were on the same fuse, they would also not work until I replaced the fuse. Anyways, I took it to my mechanic who specialized in Mercedes and confirmed that the sheathing in some of the wires inside the passenger mirror were damaged thereby causing the short. He charged about $95 to repair the frayed wires. It's been about 2 years and the fuse has not blown since.
Thanks for the information, I have since tracked down the answer to mt next question in the forma of a youtube video. How to remove passenger side mirror housing. thanks
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Old Apr 6, 2013 | 08:01 PM
  #12  
eddie a's Avatar
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From: Northbridge, Ma.
94 S420,95 S500 ,96 S500
Originally Posted by jwthom1966
Hello guy's, I am brand newbian to the forum and hate to jump in like this but I just took pocession of a 1996 S500 with 130,323 miles. It is in great shape but after one use the power seats, steering column and side mirrors are not working. " They worked once and then done" . Previuos owner said he jsut replaced that fuse befor I purchased but out again already so more than likely a short. Passenger side mirror has a crack at the connection to the car so I am guessing short maybe there???? Also, can someone point me to the fuse for the front seats??
Theres a module under the carpet on the passenger side, it controls funtions to what you have mentioned.. This is the module: http://www.ebay.com/itm/W140-Mercedes-Power-Mirror-Control-Module-140-820-14-26-/200874819616?pt=Motors_Car_Truck_Parts_Accessories&vxp=mtr&hash=item2ec5128020#ht_21wt_652
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Old Apr 8, 2013 | 01:39 PM
  #13  
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1996 S500
module

Originally Posted by eddie a
Theres a module under the carpet on the passenger side, it controls funtions to what you have mentioned.. This is the module: W140 Mercedes Power Mirror Control Module 140 820 14 26 | eBay
Thannks, I will look into this. In the mean while I am hearing that changing the 20 amp fuse under the hood should fix the issue. However, I am still a little confused (sorry) there are 3 or 4 20 amp fuses in the hood fuse box. Can some point me to sa specific fuse? Or jsut change all 20 amp fuses ?
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Old Jul 21, 2014 | 10:54 PM
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From: USA
W140 Mercedes S350, W221 S550 sport
That power rear view mirror was such a cool feature. It's gone on the 221 and 222
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Old Aug 27, 2014 | 12:47 PM
  #15  
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From: midwest
1998 w140 S420
Hi guys! I am new here on the site. I have a '98 420 and the mirrors have not worked for years now. They used to fold back, but now they just move a little and click when the button is pushed. It's like they want to work, and you can hear the mirror motor making noise, but they do nothing. Any suggestions? Many THANKS for any input.
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Old Sep 6, 2015 | 04:37 PM
  #16  
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1991 300sel
THANKS!! thank you everyone for your reply's on this. Me, SAME problem, Am freeaked out on where to look for fix, but your replies have helped as the passenger mirror was on the fritz when I bought car. I will be repairing tomorrow and will let you all know results.
THIS IS WHY THERE ARE FORUMS. THANK GOD AND ALL EVERYONE OUT THERE FOR YOU DILIGENCE IN SHARING!!!! Cheers Paul W.
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