Convertible top
Thread Starter
Newbie
Joined: Jun 2016
Posts: 2
Likes: 1
From: Innisfil On Canada
clk 320 cabriolet
Convertible top
Hi Guys I am a new member!!
I just bought my 2001 CLK 320 from a friend the car is mint with only 106000 kms always stored for the winter which brings me to my dalema?
When the car was put away for the winter the battery was disconnected, since the unit was taken out of storage the soft top does not work (was OK when it went into storage) Here is where i am at with it, when i unlock the the top and lift it 8 in all the window go down! but the the rear head rests don't go down the top will not operate, the head rests will operate when using the sw on the dash but the top will still not work sw flashes slow, i checked the pump relay and find it has 12v ready and waiting but the top switch does not send power to activate the relay,i jumped the the relay block with 12 volts and the pump operates.
I am led to believe that there are many limit switches in the system?
I would appreciate advice on how to test the system and the sequence it should be done? Dave
I just bought my 2001 CLK 320 from a friend the car is mint with only 106000 kms always stored for the winter which brings me to my dalema?
When the car was put away for the winter the battery was disconnected, since the unit was taken out of storage the soft top does not work (was OK when it went into storage) Here is where i am at with it, when i unlock the the top and lift it 8 in all the window go down! but the the rear head rests don't go down the top will not operate, the head rests will operate when using the sw on the dash but the top will still not work sw flashes slow, i checked the pump relay and find it has 12v ready and waiting but the top switch does not send power to activate the relay,i jumped the the relay block with 12 volts and the pump operates.
I am led to believe that there are many limit switches in the system?
I would appreciate advice on how to test the system and the sequence it should be done? Dave
Last edited by dasjacs; Jun 13, 2016 at 08:31 AM.
Junior Member
Joined: Feb 2015
Posts: 27
Likes: 20
From: Bismarck, North Dakota
2018 E400 convertible
Make sure the panel in the trunk is in the proper position. if it's not, the top won't go down. The windows are supposed to go down when the latch is released and the top is lifted off the windshield header, at least they do on our car.
MBWorld Fanatic!
Joined: Nov 2001
Posts: 1,258
Likes: 209
From: Boston North Shore
2001 CLK320 Cabrio
The OP said the lamp on the power roof switch is flashing slow (e.g. 1 Hz), which indicates a fault within the power roof control system.
When the trunk luggage cover is not in position or the trunk lid is open, the flashing frequency is faster (e.g. 3 Hz).
He also said that after the windows lowered, the power roof did not operate, including the prerequisite lowering of the roll-bar, which indicates that the hydraulic pump may not be operating.
Although there could be numerous reasons as to why, he also indicated that when he bypassed the pumps motor relay with a jumper, the pump operated.
Note: When overriding the relay, use caution, as the protective circuits within the power roof/RB controller (e.g. watchdog timer, temperature overload) are also overridden and the motor could over heat and burn out.
The relay has been a somewhat common failure. The relay contacts, that supply high current to the pump motor (e.g. 30 amperes), arc and become pitted, which then will no longer pass the necessary current to operate the motor.
A simple test to determine if the hydraulic pump relay is the problem, would be to just temporarily replace it with the fuel pump relay.
When the trunk luggage cover is not in position or the trunk lid is open, the flashing frequency is faster (e.g. 3 Hz).
He also said that after the windows lowered, the power roof did not operate, including the prerequisite lowering of the roll-bar, which indicates that the hydraulic pump may not be operating.
Although there could be numerous reasons as to why, he also indicated that when he bypassed the pumps motor relay with a jumper, the pump operated.
Note: When overriding the relay, use caution, as the protective circuits within the power roof/RB controller (e.g. watchdog timer, temperature overload) are also overridden and the motor could over heat and burn out.
The relay has been a somewhat common failure. The relay contacts, that supply high current to the pump motor (e.g. 30 amperes), arc and become pitted, which then will no longer pass the necessary current to operate the motor.
A simple test to determine if the hydraulic pump relay is the problem, would be to just temporarily replace it with the fuel pump relay.
Thread Starter
Newbie
Joined: Jun 2016
Posts: 2
Likes: 1
From: Innisfil On Canada
clk 320 cabriolet
Convertible top
Thanks to you guys that replied to my problem with the top I really appreciate your comments. I did figure out the problem today!! i took the special wrench supplied in the tool kit and released the top cover behind the rear seat and then tightened it again until i heard a click That was the problem i guess somehow it lost its tension ?? All is well
This could be good info for other people that is having the same issues.
Thanks again guys for your comments.
Dave J
This could be good info for other people that is having the same issues.
Thanks again guys for your comments.
Dave J
