SRS warning light after charging the comfort battery, SL 350 R230 Built 2011

I have the following problem: The comfort battery was weak, was connected to the charger overnight (was already done several times). Today started and received the following messages in the display: PLC, restraint system malfunction,workshop search, rollbar. On the driver side work seat adjustment, and window lifter, on the passenger side not. Light switch on off > left dipped light lights, right stand light lights No heating, no interior lighting, no cruise control, no Roof function, tank indicator to zero. I hope it’s only because of the comfort battery, since everything worked so far, or can it be that the ECU has a damage? Driving it still does. P.S: I would definitely order a battery, just don’t know which model. Is the Varta E11- 12V 74Ah 680A?