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Sunroof won't close! Live at the beach, thinking I need to…

Customer Question
sunroof won't close!...

sunroof won't close! Live at the beach, thinking I need to lubricate the rails somehow! any answers

Mechanic's Assistant: What is the model/year of your Mercedes?

2003 -- 230 Compressor

Mechanic's Assistant: Are you fixing your vehicle yourself? What have you tried so far?

I tried WD-40 -- no results -- roof opens normal - but does not close completely -- with out me pushing it closed -- sounds like a clutch slipping -- chatter when i try to close

Mechanic's Assistant: This is potentially serious. How long has it been going on?

Just started !

Submitted: 11 months ago.Category: Mercedes
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Answered in 14 minutes by:
9/16/2017
Mercedes Mechanic: Eric, Automotive Repair Shop Manager replied 11 months ago
Eric
Eric, Automotive Repair Shop Manager
Category: Mercedes
Satisfied Customers: 35,169
Experience: 20+ yrs. experience as repair shop manager and technician.
Verified

HI,

Ok, with the chatter, it is likely that the motor gears are worn and failing and will need to be replaced, but first, try the synchronization procedure

Performing synchronization
Open the pop-up roof with the roof system switch (N70s1) until the mechanical stop is reached and continue to actuate the roof system switch (N70s1). The overhead control panel control module (N70) continues to actuate the roof system motor (M12m1) and sets the position counter to zero when it has recognized that the roof system motor(M12m1)has been locked up for at least t=0.5 s.
Before reaching the lock-up position, at least 3 edges must have been recognized from Hall sensor 1 (M12b1) and Hall sensor 2 (M12b2)

It is not possible to synchronize the sliding/pop-up roof with the "Convenience opening, convenience closing" and "Automatic opening/closing" features, because these functions are not possible in the desynchronized state.

The sliding/pop-up roof is then in the synchronized state, i.e. the overhead control panel control module (N70) can switch off the roof motor system (M12m1) when the sliding/pop-up roof is being opened/closed in the automatic mode before reaching the mechanical stop.

If this does not work, then you will need to replace the motor - if you want directions for that, let me know

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Mercedes Mechanic: Eric, Automotive Repair Shop Manager replied 11 months ago

HI,

Did you need or want directions to replace the motor assembly

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Customer reply replied 11 months ago
No not a motor problem! The roof move is too resistive -- when I push the roof it move forward with the power on - switch forward - roof binding!
Mercedes Mechanic: Eric, Automotive Repair Shop Manager replied 11 months ago

HI,

Ok, this means an issue most likely in either the tracking or the cables binding. In both cases the sunroof is going to need to be removed which will involve removing the headliner. This is around a 6-7 hour job due to all the trim that comes off before the headliner can come out

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