Hello dear community, since you can hardly find any information on the web for the SL R230 and there are no repair manuals to buy, I ask you here once. Where in the SL 500 R230 is the Variodach control unit installed? The problem with the tools: The Variodach often stops at half when opening or closing. ADAC and MB specialist workshop could not analyze or find the error on site. Now I have researched a little. The most common problems of this kind are the following: genden: 1) Switches of the boot boundaries 2) Switches of the boot cover 3) Hydraulic pump 4) Hydraulic hoses 5) Variodach control unit My realization: When I carry out a deep diagnosis via OBD and an app, then it is the case that one can suddenly close the roof again or open it. Therefore, I assume that if the control units are addressed via the diagnosis – especially the control unit for the Variodach in the case – then it awakens, so my guess. I would buy and install a used ECU before I bring the vehicle back to the workshop for expensive money. Thank you for your answers in advance!