sunroof stuck after checking for water ingress. (G55AMG)

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Stuckmojo
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G55 AMG. I found water leaking onto the driver's side A pillar. The alcantara/thing on the pillar was wet.

 

I opened the sunroof to look at the drain tube - after reading here -  and it got stuck 80% of the way back. No clicking noise from the motor but it churned back very slowly until dying. I wound it back manually with a spanner - great tip! and now it doesn't move. I don't think the motor is dead as I heard it clicking once I'd wound the sunroof forward to closed position. Until today it w

orked fine but hasn't been used in a long time. Thoughts?

 

 

While I'm at it I want to do all the sunroof seals as the car had been in Dubai and I'm sure that the seals are as dry as the Ghobi desert. 

 

Thoughts? 

 
 
 
Arnie
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Re: sunroof stuck after checking for water ingress. (G55AMG)

Sunroof seals are about £40 something from the dealer. There are two drain channels in the sunroof tray (the stationary frame part attached to the roof)- one on front left and other on front right. Probably not an issue in your case, but in many older vehicles, the little drain tubes rust away causing water ingress as you describe. However, do check that they are not blocked (there are some older posts on this subject on the forum). The tubes are attached to small hoses that drain at the rear of the front wheel arches. Gently pour some water into the corners and ensure that it drains out.

Watch this: https://www.youtube.com/watch?v=zIAkmgg5DsI

 

Stuckmojo
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Re: sunroof stuck after checking for water ingress. (G55AMG)

Thanks for this. I watched the videos. 

Sunroof is incredibly stiff to move (It was hard to spin back even with the wrench) so I guess the issue is gunk in the mechanism and having the seals done. Waiting for my indie to get back to me and I'll take the car to him. 

 

prwales
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Re: sunroof stuck after checking for water ingress. (G55AMG)

a bit of drain cleaner might help too, I put a small amount in my screenwash to keep the water jets free as well

Stuckmojo
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Re: sunroof stuck after checking for water ingress. (G55AMG)

Thanks for the update. 

 

Weirdly, the sunroof moves back under its own power but doesn't tilt or close. Car will go to a specialist in a few days as I have a few things to look at so I asked him to look/fix. 

I'll report back. 

Arnie
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Re: sunroof stuck after checking for water ingress. (G55AMG)

You may need to reset the sunroof open/close limits by holding the switch in one of the positions -don't remember which. Otherwise, the tilt and close will not operate properly. The slide rails will need a good clean and lubrication from sand and dust.

 

Stuckmojo
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Re: sunroof stuck after checking for water ingress. (G55AMG)

Thanks Arnie. (as always). I'll look that up, but won't try today as we have snow and I'm not leaving the house :)

prwales
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Re: sunroof stuck after checking for water ingress. (G55AMG)

mine broke a few years back and I had it repaired with w126 parts, unfortunately its partially broken again, it will tilt but wont slide back