Hello, I’m going on with a separate thread here, so that I don’t fill the other one with OT. Unfortunately, I didn’t have the charging socket in my SL, but I often don’t use the car over the winter months. At my previous SL55 R230 I had the socket in the trunk switched on the comfort battery and connected the car to maintain the charging via a CTEK MXS 5.0. This would also be possible here in principle, since the car also has this 12V socket. I only plan B, because the SA 675 pre-equipment for battery charger is also possible with the R231. Question: Who has this feature and can set a photo and describe exactly where this socket is located? Does the cover in the trunk always have to be raised to the connection or does the charging cable go into place like this? Do you need a specific charger and/or cable for the CTEK MXS 5.0 (is compatible with the MB charger)? Thank you.