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The most common cause for this fault here is a faulty micro switch.Your roof system uses several micro switches that send signals on what position the windows are in, the roof bow points are in and latches as well as the roll bar.Usually one of these switches fails to send the proper signal and keeps the roof from operating.Since there are several of these switches it is difficult to say from here for sure which is at fault to replace.
What has to be done is to have the fault codes read out/checked with a compatible scan tool or computer that will plug in and can read all computers in your model.Once this is done any codes set then need diagnosed to help locate and repair this fault.The scan tool is also used to monitor each position switch to locate the faulty switch needing replaced.
You will have at least one code set in the roof computer with this issue here that will need to be diagnosed to then locate and repair this fault.
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Is the control switch for the roof operation flashing at all or any warning lights/messages coming up when trying to operate the roof?
O.k.,the flashing can indicate there is a code set as a fault is detected.It is best to have the codes checked if you can get this done as this will help allot here.
It is very possible the control relay can be faulty.It may not be clicking due to an internal fault with it.But in some cases it may not be clicking as the control unit may not be operating it due to a fault detected.You can definitely try the relay to see if it will work but if it does not then you will need to have the codes read out to help locate the issue here since there are so many different components that can act up or fail causing this issue especially a faulty micro switch.
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