Mercedes Repair Questions? Ask a Mechanic for Answers ASAP
Hello, I am Jose Sebastian. Your automotive expert, It's a pleasure to me to attend your question. Thank you very much for trust in just answer.
Dear customer, it would be very useful if you could share with me a video of how the roof is working to observe where it is getting stuck or where it is not activating because it seems to me that the problem it is presenting is at the rails that may not be moving correctly, maybe because they are getting stuck or damaged, the other problem I am seeing is that the pump may not be generating adequate pressure to move the roof system correctly, the pump may be activating but it is probably not generating adequate pressure to move the roof with enough power..
Dear customer, maybe you had problems at the pump, that is, the pump was losing its pressure until it reached the end of its useful life.
My recommendation is to start with the fuses and relays, then the rail tracks to make sure there is nothing obstructed, which is the simplest, also check with a battery. Then with a tester or multimeter you will check if the electrical voltage is reaching the pump, if you have power it is likely to be the pump.