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Sunroof Issues

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Old May 14, 2012 | 03:57 AM
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UR2SLO's Avatar
UR2SLO
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Sunroof Issues
Hi,

90% of the time when I'm closing my sunroof from the full open position while driving/parked the sunroof will close then slide back open again half way. I replaced the motor last week and the switch last year. Any ideas?
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Old May 14, 2012 | 11:56 AM
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roadrutz
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From: Kelowna, BC
'09 ML550
Mine has done that since new and been "fixed" four times, to no avail. I now just regard it as a feature as I'm fed up with taking the vehicle in to have it "fixed" again.
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Old May 14, 2012 | 10:20 PM
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dgiturbo
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His 2019 RAM Cummins Turbo Diesel Laramie; Her's 2007 ML320 CDI P3; Mine BMW R1200R
Try holding the switch in the closed position for about 4 seconds after it closes?
Might help it to "learn" where it should be.
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Old May 15, 2012 | 07:40 AM
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06e320cdi
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I think the air deflector is binding and the sunroof thinks there is something caught. You can test this but trying to stop the sunroof with your hand before it closes and see if it does the same thing. I agree with the "relearn" process stated above also. My E did this and my ML does this on occasion, someone said the rails might need to be lubed. Hope you didnt replace the motor because of this issue, if so, bad diags on part of dealer.
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Old May 15, 2012 | 10:18 AM
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roadrutz
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From: Kelowna, BC
'09 ML550
Originally Posted by 06e320cdi
I think the air deflector is binding and the sunroof thinks there is something caught.
There is no doubt that this or something very similar is the problem, but 'teaching' it per dgiturbo's instructions only works for very minor changes in sensitivity. I spoke to a regional Mercedes mechanic who said, off the record, that the sensitivity can be changed by the dealer but for simple ignorance of the procedure most dealers won't perform the fix. Logically it would seem that it should be childishly simple to adjust the sensitivity, but then a lot of things about Mercedes aren't always that logical. I suppose there could also be legal issues: Dealer makes the sunroof less sensitive, six months later little Johnny's neck is damaged when he is standing on the center console with his head out of the roof and he accidentally touches the 'close' control and the closing sunroof fails to retract when it encounters his brainless little head, dealer gets sued for a gazillion dollars, jury awards punitive damages, 100,000 ML owners now have to live with sunroofs that won't close properly, and life goes on in The Suenited States of America.

Alternate possibility: my dealer is clueless.
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Old May 15, 2012 | 03:10 PM
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06e320cdi
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From: Cross Roads, PA
2008 ML320CDI
Just like in the commercial

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Old May 15, 2012 | 09:44 PM
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dgiturbo
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From: Woodstock, IL
His 2019 RAM Cummins Turbo Diesel Laramie; Her's 2007 ML320 CDI P3; Mine BMW R1200R
You should have warned not to try to sip beer when watching this commercial....
Now I have to clean my keyboard and monitor from the beer that just spewed out of my nose..
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Old May 16, 2012 | 12:28 AM
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06e320cdi
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Originally Posted by dgiturbo
You should have warned not to try to sip beer when watching this commercial....
Now I have to clean my keyboard and monitor from the beer that just spewed out of my nose..
Sorry bud... Element of surprise. LOL
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Old May 16, 2012 | 12:46 AM
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Originally Posted by 06e320cdi
I think the air deflector is binding and the sunroof thinks there is something caught. You can test this but trying to stop the sunroof with your hand before it closes and see if it does the same thing. I agree with the "relearn" process stated above also. My E did this and my ML does this on occasion, someone said the rails might need to be lubed. Hope you didnt replace the motor because of this issue, if so, bad diags on part of dealer.
Last year they "cleaned it" numerous times and replaced the switch once. Last week they changed the motor. I took it in two days ago just before my body shop appointment and the foreman said he wants its again for a few days and says there definitely is a problem. I went to another dealer last year to check with them and they "cleaned and reset it", but tried to charge me for it telling me "sunroof only has a one year warranty", I told them B.S since my other dealer is servicing it for free and its a 2008.

Im booked for first week of June since my ML will be in the bodyshop for a week or two now. My 08 only has 15 000 miles lol.
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Old Dec 29, 2014 | 11:41 PM
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2003 C240
Sun Roof Control Relearn
Sun roof issues try this

Hold the button in each position for 5 seconds

<iframe width="560" height="315" src="//www.youtube.com/embed/iN99BwjMxSg" frameborder="0" allowfullscreen></iframe>
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Old Dec 29, 2014 | 11:46 PM
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krinderhagen
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2003 C240
Sun Roof Control Relearn
Sun roof issues try this

Hold the button in each position for 5 seconds


Last edited by krinderhagen; Dec 29, 2014 at 11:48 PM.
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