Moonroof Problem?? One touch button not working
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C300
Moonroof Problem?? One touch button not working
Hi... first time posting here.. what's wrong with my c300's moonroof? One touch button works while opening all the way, but not closing.. It just closed little by little(like stop n go), and i had to kept holding the button.. It had the jerking sound.. It had this problem since day one.. Can someone help? thanks...
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\
I would guess there might be a small obstruction in the track which is triggering the safety mechanism that keeps it from closing on retarded people's necks. Warranty?
EDIT: Also you do know that you have to press the button as far as it will go for one touch close right? If you're just giving it a quick tap, it's never gonna happen.
EDIT: Also you do know that you have to press the button as far as it will go for one touch close right? If you're just giving it a quick tap, it's never gonna happen.
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From: Charlotte, NC
Had: 1987 300TD, Had: 2004 C230 Sport Sedan, Have: 2014 E350 Sport, Have: 2019 S450
Have you tried re-synching the roof?
Hold the button until 5 seconds after the roof is fully open, then hold the button in the other direction until 5 seconds after the roof is fully closed. (or RTFM)
Hold the button until 5 seconds after the roof is fully open, then hold the button in the other direction until 5 seconds after the roof is fully closed. (or RTFM)
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From: Inland Empire, CA
2015 C300 4Matic (W205)
i had the exact same problem several times and was unable to fix it; sometimes it would work and other times it wouldnt. take it into the dealer and they will work their "magic" . . . but yeah for technical terms its just a re-synching that is needed.
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C300
I did try re-synching, but still not working... Also, i took out the fuse of the moonroof for couple mins. then reinstalled it back...No luck... not working....Did the dealer tell u what the problem was? How long did it take to fix it??? thanks..
Last edited by blueacc333; Aug 28, 2009 at 02:52 PM.
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Posts: 34
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From: Inland Empire, CA
2015 C300 4Matic (W205)
ever tried re-synching it myself in fact never hear of doing it the way discussed above. the dealer simply told me it was synchizing issue. Whatever they did on there end worked for me. now, if i could get them to fix or replace the sweeky mirror we would be in business!
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LOADED 08' C350 & 14' GLK-350 Diamond White (P1, MM, AMG Pkg, Ln Trkng, Htd Sts, Keylss Go)
ya my mirrors still squeak after 2 years... they could never fix it... that would be sweet if they replaced my mirrors under warranty with the new 2010 mirrors!
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c300 sport
Software needs an upgrade maybe.
I had the same problem with my '08 and the dealer re-synced it a couple of times and then finally ordered a new unit from Germany. Problem still not solved till they found out there was a software upgrade pending, once that came out and they "flashed" the car all is good.
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From: Bergen Co,NJ
14' CLS550
i had the same problem, it opens smooth 1touch, but closing u have to hold onto the button and it closes in a jerky motion.. dealer fixed it in 30 min.. but now im having the same problem in my passenger window.. opens 1touch but i have to hold the button when wanting to close
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From: Fairfield county, CT.
2004 Ran SRT-10,2007 S550,2016 E400c
New software
I had the same problem with my '08 and the dealer re-synced it a couple of times and then finally ordered a new unit from Germany. Problem still not solved till they found out there was a software upgrade pending, once that came out and they "flashed" the car all is good.
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From: Fairfield county, CT.
2004 Ran SRT-10,2007 S550,2016 E400c
you wont get the 10 covers though.. its a problem with the spring in the frame. But ive checked the price of the upgrade it not that pricey to switch to the 10 mirror covers and they look so much better
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C300
need any canbus led?? I will hook it up..
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From: Argyle, TX
10 Tahoe LT, 07 Silverado Z71, 99 BMW R1100RT
The sunroof in my wife's o8 C350 just recently started doing the thing where it opens just fine, but you have to close it by holding the switch in the position and then it closes about an inch at a time. Pretty annoying, if you ask me...
First thing that came to my mind was resynching, of course. Did the procedure as described in the Owner's Manual (open roof all the way, then hold the switch for "approximately" 1 second more), but to no avail.
If it indeed is the software issue, what is the procedure with cars that are out of warranty? Do the dealer charge you an arm and a leg for that just because they can?
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2012 C350 Palladium Sport Sedan
Somewhat related...
If I have the roof tilted up, am I supposed to be able to one touch to have it slide open? Currently I have to one touch to close it and then retouch to have it slide open. I miss that from my last car, being able to one touch a tilted roof to fully open.
If I have the roof tilted up, am I supposed to be able to one touch to have it slide open? Currently I have to one touch to close it and then retouch to have it slide open. I miss that from my last car, being able to one touch a tilted roof to fully open.
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From: SEATTLE WASHINGTON USA
'08 C300 Lux Barolo Red Beige Leather P2 MM 18" wheels '84 944
Has anybody confirmed this regarding the sunroof?
The sunroof in my wife's o8 C350 just recently started doing the thing where it opens just fine, but you have to close it by holding the switch in the position and then it closes about an inch at a time. Pretty annoying, if you ask me...
First thing that came to my mind was resynching, of course. Did the procedure as described in the Owner's Manual (open roof all the way, then hold the switch for "approximately" 1 second more), but to no avail.
If it indeed is the software issue, what is the procedure with cars that are out of warranty? Do the dealer charge you an arm and a leg for that just because they can?
The sunroof in my wife's o8 C350 just recently started doing the thing where it opens just fine, but you have to close it by holding the switch in the position and then it closes about an inch at a time. Pretty annoying, if you ask me...
First thing that came to my mind was resynching, of course. Did the procedure as described in the Owner's Manual (open roof all the way, then hold the switch for "approximately" 1 second more), but to no avail.
If it indeed is the software issue, what is the procedure with cars that are out of warranty? Do the dealer charge you an arm and a leg for that just because they can?
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Posts: 506
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From: Argyle, TX
10 Tahoe LT, 07 Silverado Z71, 99 BMW R1100RT
This is how the procedure is described on page 275. 
Switch on the ignition ( page 82).
Press and hold the sunroof switch in
the direction of arrow1 until the
tilt/sliding sunroof is fully raised at the
rear.
Keep holding the sunroof switch in the
direction of arrow1 for approximately
1 second.
Check the Express-operation feature
( page 275).
If the tilt/sliding sunroof opens completely,
the sunroof is synchronized.
Otherwise repeat the above steps.
Press and hold the sunroof switch in
the direction of arrow1 until the
tilt/sliding sunroof is fully raised at the
rear.
Keep holding the sunroof switch in the
direction of arrow1 for approximately
1 second.
Check the Express-operation feature
( page 275).
If the tilt/sliding sunroof opens completely,
the sunroof is synchronized.
Otherwise repeat the above steps.
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From: NNJ
'11 C350 '13 F150 lariat
Alot of C's have this problem, I had it in my 08. I had to take it to the dealer, my brother in law is service manager. Its the overhead console where the button it that gets F'd up, they flash it and resync it in 10 min. Never came back when I had the car, but the tech said they had ones that came in for a second and third time even. The 5 second sync doesnt work AFAIK and the tech said its not for every model, its a specific class fix for other lines......
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Joined: Feb 2004
Posts: 3,986
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From: SEATTLE WASHINGTON USA
'08 C300 Lux Barolo Red Beige Leather P2 MM 18" wheels '84 944
Alot of C's have this problem, I had it in my 08. I had to take it to the dealer, my brother in law is service manager. Its the overhead console where the button it that gets F'd up, they flash it and resync it in 10 min. Never came back when I had the car, but the tech said they had ones that came in for a second and third time even. The 5 second sync doesnt work AFAIK and the tech said its not for every model, its a specific class fix for other lines......
At least it hasn't been found wandering the streets at 3AM.
Moonroof malfunction
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From: San Jose, CA
2010 c300
Mine works fine so my question might be slightly off topic. On my previous w203 if the sunroof was on tilt open and I want to open completely, I just had to pull the button backward and it will close and open automatically with just 1 push. And vice versa. With the w204 I have to first close it. Then I pull the button backward. So it requires 2 pushes. Is this normal?
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Posts: 211
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From: Ft Bragg
2012 C63 ///AMG coupe
hey guys,
I have a 2009 C63 and this jerking sunroof just happened. I followed the instructions but no luck. Dealer is charging me to fix it. Is there any steps? My windows re-synced already. thanks
I have a 2009 C63 and this jerking sunroof just happened. I followed the instructions but no luck. Dealer is charging me to fix it. Is there any steps? My windows re-synced already. thanks
