W221 only driver window is working 😬 NO error code on scan tool
Thread Starter
Junior Member
Joined: Oct 2024
Posts: 15
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w221 s350 2007
W221 only driver window is working 😬 NO error code on scan tool
I bought my W221 from a salvage auction. The car had 180,000 km when I got it. Initially, the rear driver’s window and the driver’s window were working, but after a day, the rear driver’s window stopped working, and the driver’s window worked intermittently. Now, only the driver’s window is working, while both the passenger and rear windows are not working at all.
I’ve heard that this issue might be resolved with a software update. Is that true? I have an Autel MX808S, but it seems this device doesn’t support programming or updating the window module or software. When I scan with the tool, both the driver and passenger window buttons appear to be working, and I don’t get any fault codes related to this issue.
What’s interesting is that the rear window blind shade (on the rear glass) works from the rear door panel, but both the rear window and the side window blinds don’t respond. Any advice on how to proceed?
I’ve heard that this issue might be resolved with a software update. Is that true? I have an Autel MX808S, but it seems this device doesn’t support programming or updating the window module or software. When I scan with the tool, both the driver and passenger window buttons appear to be working, and I don’t get any fault codes related to this issue.
What’s interesting is that the rear window blind shade (on the rear glass) works from the rear door panel, but both the rear window and the side window blinds don’t respond. Any advice on how to proceed?
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Joined: Aug 2014
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S500
I think ONE post listing multiple canbus related faults would be more helpful than multiple small queries
that said you might get LUCKY - all four door modules on early cars (before late 2007) had a low threshold on a thermal trip for each window - its inside each individual door module - a little slight of hand by the criminals that make these cars was to ensure on the 221 the thermal trip doesn't auto reset like it does on nearly every other car in the world !
then of course - main dealers NEVER bothered to flash updates - some with the tools still tell owners to go away and that its not possible
and the real geniuses when fixing the often dead drivers door - only bother to flash that one door module
that said you might get LUCKY - all four door modules on early cars (before late 2007) had a low threshold on a thermal trip for each window - its inside each individual door module - a little slight of hand by the criminals that make these cars was to ensure on the 221 the thermal trip doesn't auto reset like it does on nearly every other car in the world !
then of course - main dealers NEVER bothered to flash updates - some with the tools still tell owners to go away and that its not possible
and the real geniuses when fixing the often dead drivers door - only bother to flash that one door module
Thread Starter
Junior Member
Joined: Oct 2024
Posts: 15
Likes: 0
w221 s350 2007
I think ONE post listing multiple canbus related faults would be more helpful than multiple small queries
that said you might get LUCKY - all four door modules on early cars (before late 2007) had a low threshold on a thermal trip for each window - its inside each individual door module - a little slight of hand by the criminals that make these cars was to ensure on the 221 the thermal trip doesn't auto reset like it does on nearly every other car in the world !
then of course - main dealers NEVER bothered to flash updates - some with the tools still tell owners to go away and that its not possible
and the real geniuses when fixing the often dead drivers door - only bother to flash that one door module
that said you might get LUCKY - all four door modules on early cars (before late 2007) had a low threshold on a thermal trip for each window - its inside each individual door module - a little slight of hand by the criminals that make these cars was to ensure on the 221 the thermal trip doesn't auto reset like it does on nearly every other car in the world !
then of course - main dealers NEVER bothered to flash updates - some with the tools still tell owners to go away and that its not possible
and the real geniuses when fixing the often dead drivers door - only bother to flash that one door module
Thread Starter
Junior Member
Joined: Oct 2024
Posts: 15
Likes: 0
w221 s350 2007
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S500
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From: Republic of Texas
'99 and '05 E55 AMG
What are the voltages on the CANBUS? Twice I have had multiple non-operative modules caused by one failed module disrupting the CANBUS. Try checking the dormant (key off and system asleep) and the active (key on and system active) voltages on the Hi and Lo lines. If either is not correct, it can cause multiple modules to be inoperative.
See if any of the following will assist; a few links and an attachment. Be advised I do not know if the CANBUS voltages for the W221 are the same as the W220 but it gives you a starting point. The W221 does NOT use the CANBUS voltages of the W210 so use my posts as reference only.
https://mbworld.org/forums/e-class-w...is-repair.html
https://mbworld.org/forums/e-class-w...ml#post8958920
https://mbworld.org/forums/w211-amg/...-no-start.html
See if any of the following will assist; a few links and an attachment. Be advised I do not know if the CANBUS voltages for the W221 are the same as the W220 but it gives you a starting point. The W221 does NOT use the CANBUS voltages of the W210 so use my posts as reference only.
https://mbworld.org/forums/e-class-w...is-repair.html
https://mbworld.org/forums/e-class-w...ml#post8958920
https://mbworld.org/forums/w211-amg/...-no-start.html
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Junior Member
Joined: Apr 2008
Posts: 18
Likes: 1
From: USA
2007 S550
I bought my W221 from a salvage auction. The car had 180,000 km when I got it. Initially, the rear driver’s window and the driver’s window were working, but after a day, the rear driver’s window stopped working, and the driver’s window worked intermittently. Now, only the driver’s window is working, while both the passenger and rear windows are not working at all.
I’ve heard that this issue might be resolved with a software update. Is that true? I have an Autel MX808S, but it seems this device doesn’t support programming or updating the window module or software. When I scan with the tool, both the driver and passenger window buttons appear to be working, and I don’t get any fault codes related to this issue.
What’s interesting is that the rear window blind shade (on the rear glass) works from the rear door panel, but both the rear window and the side window blinds don’t respond. Any advice on how to proceed?
I’ve heard that this issue might be resolved with a software update. Is that true? I have an Autel MX808S, but it seems this device doesn’t support programming or updating the window module or software. When I scan with the tool, both the driver and passenger window buttons appear to be working, and I don’t get any fault codes related to this issue.
What’s interesting is that the rear window blind shade (on the rear glass) works from the rear door panel, but both the rear window and the side window blinds don’t respond. Any advice on how to proceed?
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MBWorld Fanatic!
Joined: Aug 2014
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S500
update door module software on ALL four doors - its great to hear so many well maintained cars still out there - the software was a free update 17 years ago - but don't expect Merc to remember that any more - its 10 mins work per door MAX
Junior Member
Joined: Apr 2008
Posts: 18
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From: USA
2007 S550
Botus, are you aware of any Scan Tool / Software, other than Xentry, that can successfully update the door modules?
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S500
.... it would need to be online kit to pull the later files from either local NAS or Manu servers back at base, to load on the module
all the big boys diagnostics manus are pretending they can do it - real cars are easier, Merc disaster zone is online hand holding only - but these are huge money tools (3 to 5K US$) , maintaining the access nearly as much with annual subscription (2K US$) costing yet more money....
if working on Mercs all day or wish to look after your pride and joy - here's a man that can far cheaper than those tools https://benzninja.com/
all the big boys diagnostics manus are pretending they can do it - real cars are easier, Merc disaster zone is online hand holding only - but these are huge money tools (3 to 5K US$) , maintaining the access nearly as much with annual subscription (2K US$) costing yet more money....
if working on Mercs all day or wish to look after your pride and joy - here's a man that can far cheaper than those tools https://benzninja.com/
Super Member
Joined: Feb 2009
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From: Brooklyn, NY
2007 S550 4Matic 2013 S550 Base
