SLK R170 Roof Problem

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colinallcars

Active Member
Joined
Jul 17, 2007
Messages
860
Car
B180, SLK 230
Had the roof down on a drive up to Oban for a ferry to Mull yesterday. We stopped at Tyndrum for a coffee and the roof wouldn’t close. Being a bit pressed for time we carried on and got to our destination. Googling suggested that the problem was probably down to the unusually hot weather which seemed strange to me as 28 degrees is not uncommon in many places these cars were sold. The symptoms were no electrical power as the switch didn’t light up when trying to operate it although the fuses were all intact. Fear of a thunderstorm led me to raise the roof manually (after a bit of faffing around as the allen key was missing) which is the condition it’s in now. My question is, how do I go about reinstating it, assuming the temperature thing is correct? I’m guessing lower it manually back to where it was when the fault developed and try operating it with the switch but could the manual interventions have left something out of synch. Is there a guide for bringing it back to life?
 
Had the roof down on a drive up to Oban for a ferry to Mull yesterday. We stopped at Tyndrum for a coffee and the roof wouldn’t close. Being a bit pressed for time we carried on and got to our destination. Googling suggested that the problem was probably down to the unusually hot weather which seemed strange to me as 28 degrees is not uncommon in many places these cars were sold. The symptoms were no electrical power as the switch didn’t light up when trying to operate it although the fuses were all intact. Fear of a thunderstorm led me to raise the roof manually (after a bit of faffing around as the allen key was missing) which is the condition it’s in now. My question is, how do I go about reinstating it, assuming the temperature thing is correct? I’m guessing lower it manually back to where it was when the fault developed and try operating it with the switch but could the manual interventions have left something out of synch. Is there a guide for bringing it back to life?
Problem solved and I take my hat off to the guy who figured this out!

It turned out I was incorrect, a 5 amp fuse had blown but it was difficult to see. What caused the fuse to blow and the roof become inoperative is what else is on the circuit, the cooling fan for the electronics including the various control units - it had seized. I’ve removed the fan, replaced the fuse and everything is working again but I don’t want to drive it without a cooling fan in this weather, a new one is on order for just over £80.

 
As is often the case with Mercedes components, the manufacture’s part number was on the fan so I was able to source it for £81, half Mercedes’ price.
Thanks to excellent service from Farnell the electrical supplier and their courier, the fan is installed and working. It forces quite a bit of air around the circuit boards so should keep them nice and cool.

l
 

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