alland

Here is another Vario roof problem for the long list. Last year I bought a 2017 SL 63. This summer I've had trouble with the roof beginning with the first drive through the car wash. After going through the wash, the roof refused to go down all the way. After a couple of days sitting in the garage it decided to work again and continued to work through several cycles. A few weeks later though, it refused to go up and is now permanently in the lowered position. Although this is great if the weather stays warm and sunny..... The error code is B2539/ 1N52 "Vario roof control code". When i try to raise the rear air deflector i get the message "extend only when roof open". This leads me to believe that one of the sensors is telling the computer that the roof is up when it's actually down.
I've also noticed that when I open the trunk, the lid opens but the roof does not slide back to allow access to the trunk. Both these problems seem to have happened at the same time, as best as i can tell. Both problems seem to have occurred shortly or immediately after car washes. Could just be coincidence.
I took the problem to one independent shop but they told me that they do not work on roofs so it looks like an expensive trip to the dealer.
I thought I'd run it by the forum first in case someone had a solution. Fingers crossed.
Allan

crconsulting

Your car is an R231, but this sounds like a water incursion issue….
I would inspect the trunk thoroughly for water leaks, maybe near the rear SAM.

Good Luck!

alland

I just realized i posted in the wrong forum. Thank-you for pointing this out.