Good day, I have a problem with my Vario roof. (SLK 350 2008 R171) Short history: A day before the holiday the roof worked quite normally (on and off). After a longer motorway ride I wanted to open the roof, but nothing happens. No message in the instrument cluster. Normally comes the message for the trunk cover that is not closed and thus the roof can not be opened. But not even this comes to light when I press the switch. A roof module is installed. I have read from relays that can give up the mind? Has someone ever had the same error or can the roof module cause it? I thank you in advance.