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mercedes sl500 r129 weird roof problem

Sandra SL 500

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Joined
Dec 4, 2013
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14
Car
SL 500 V8
hi everyone I have a 1990 Mercedes sl500 and seem to have a strange problem with the roof.

I purchased a diagnostic device to pull the codes and reset if needed .

when I reset all the codes the roof works perfectly fine up and down as many times as you like , as soon as I take the car for a drive it can be 5 seconds up the road or 30 minutes when I want to put the roof back up it wont work . I have to reset the faults to make the roof work again .

can someone help me with the codes telling me what needs to be done to cure the problems.

On socket 10 it flashes 29 - No axle vehicle wheel speed sensor signal
On Socket 10 it flashes 30 - soft top operation blocked

any help would be great

thanks for your time
 
The roof mechanism has a limiter to stop you operating the roof on the move, which it will rely on signal from the wheel speed sensors to ascertain. If it's not getting the right signal because the sensor is faulty, then it'll block operation.

Fix the faulty wheel sensor.
 
the roof mechanism has a limiter to stop you operating the roof on the move, which it will rely on signal from the wheel speed sensors to ascertain. If it's not getting the right signal because the sensor is faulty, then it'll block operation.

Fix the faulty wheel sensor.

+1
 
hello thanks for the advise , is there anyway to point out which wheel sensor is faulty ??
 
The roof mechanism has a limiter to stop you operating the roof on the move, which it will rely on signal from the wheel speed sensors to ascertain. If it's not getting the right signal because the sensor is faulty, then it'll block operation.

Fix the faulty wheel sensor.
i am facing the same problem r129 500sl, i get code 29 on pin 10. i have checked all speed sensors. they seem ok or maybe we have not done check as should? . code 29 cannot be reset. code 30 always is cleared . what shall i do? any ideas will be appreciated
 
hi everyone I have a 1990 Mercedes sl500 and seem to have a strange problem with the roof.

I purchased a diagnostic device to pull the codes and reset if needed .

when I reset all the codes the roof works perfectly fine up and down as many times as you like , as soon as I take the car for a drive it can be 5 seconds up the road or 30 minutes when I want to put the roof back up it wont work . I have to reset the faults to make the roof work again .

can someone help me with the codes telling me what needs to be done to cure the problems.

On socket 10 it flashes 29 - No axle vehicle wheel speed sensor signal
On Socket 10 it flashes 30 - soft top operation blocked

any help would be great

thanks for your time
have you fixed the issue? i am facing the same problem!
 
It's a ten-year-old thread, but the OP is still active (now with a CLA), and posted a few days ago, so you may be lucky and get a response. Fingers crossed...
 

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