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Discussion Starter #1
Just tried my roof and the open sequence gets to lowering the side windows front and rear and the trunk lid unlocks and opens then nothing. All I can hear is the motor?

Im new to this and ive read so many different threads about this but is there a procedure to start through or a process of elimination?

Any help would be great.

Many Thanks Jon
 

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Discussion Starter #6
Just went outside to investiagte a bit more, started car and gave the button a push and it worked! What a result im so chuffed. Finally some good has come out of buying this car as immediately I had to spend on a front ABS sensor and I also had an auto electrician trying to find a knackered wire so I could MOT the car.

Finally got the car MOT'd yesterday so one last problem to fix is the heater. The fan does not come on although I can feel the hot air through the vents?
 

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Premium Member 2004 SLK200K
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Make sure you treat all the rubbers with Gummi Pfledge and grease all the roof articulations , it sounds as they mey have been a bit siezed / stuck ..
 

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Administrator 2009 SLK 55 AMG/Founding Member 2006
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Patience is a virtue! It will all be good!
 

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Just went outside to investiagte a bit more, started car and gave the button a push and it worked! What a result im so chuffed. Finally some good has come out of buying this car as immediately I had to spend on a front ABS sensor and I also had an auto electrician trying to find a knackered wire so I could MOT the car.

Finally got the car MOT'd yesterday so one last problem to fix is the heater. The fan does not come on although I can feel the hot air through the vents?
Good news, I wish mine would do the same and simply fix itself up.

Cheers, mark
 

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Discussion Starter #12
Not so good news just tried to open it again on this glorious day and it got stuck again ffs! It got as far as lowering all windows then the boot flipping open. After you can hear the motor spinning but that's it. I tried it a few times and even tried to apply a bit of pressure but still no!


Sent from AutoGuide.com Free App
 

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Mine did just the same......
Was diagnosed as one of three switches.
I did notice that "sometimes" if I tugged up on the trunk lid after it was open as far as it would, The roof would move.
So we replaced the "trunk open" switch and FIXED !!!
 

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Administrator 2009 SLK 55 AMG/Founding Member 2006
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starfighter,

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Discussion Starter #15
Well it opened and closed @ the start of the day then come this evening it got stuck again.

I had the car scanned by a Neighbour and these are the codes diagnosed: B1268, B1275, B1279.
I have not yet had a chance to look these up but will do this evening.

The Neighbour who scanned it is an auto electrician and he managed to open it by releasing it manually with the allen key. He suspects it's the catches above the windscreen as these are not releasing?


Sent from AutoGuide.com Free App
 

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Discussion Starter #16
Thought id update this thread as I have now cured the problem.

I manually released the roof using the allen key, removed the 3 screws to drop the headlining down and the piston that turns upon opening that detaches the roof from the top of the windscreen had seized either due to lack of use or not being maintained. So I sprayed wd40 on it and turned it a few times to work the grease in and thats it job done! Before when I tried to open via the allen key it was really stiff and now I know why. Now it works effortlessly!
 

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Discussion Starter #19
So after figuring out the roof I had a new low today. Got in the car this morning as normal drove to the gym, done my workout come back to the car and it doesn't start. No cranking at all. All lights are on dash, everything else works but nothing. I tried about 20 times to crank and still nothing. So called the AA to recover me then after 10 mins of waiting I tried and it started. WTF this car is jinxed!

So I have been doing some research and im gathering this is something to do with the dreaded K40 relay?
 
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