Hello, maybe someone has a few tips for my problem here. The alternator no longer charges the battery at my year 1997 SLK. Among other things on the BAB. I measured today everything that occurred to me times with a multimeter. The Lima delivers 19.5 volts. This voltage also arrives at the separation relay/crash relay (near the battery, was installed until about 1998 in the SLK). However, it does not go from there to the battery. On the line are only the approx. 12.7 volts. the battery on. So probably the relay did for what it is intended for and the connection Lima to the battery cut off. On the one hand this probably means that the separation relay has to be new. On the other hand, however, the question arises why the Lima supplies 19.5 volts. There could of course be the regulator of the Lima defective. In another forum post someone had a similar problem and the Lima for a new one changed and in consequence the new one produced exactly the same overvoltage. Only when he the I switched the separation relays again. On the pathogen line of the Lima I have with ignition and engine from 0 volts. On ignition I measured 0.8 volts there and with running motor it fluctuated between approx. 12 and 14 volts. I ask myself the following questions: Without having the current plan now it looks as if the pathogen line from the area of the motor control unit. Could this have a problem, which the Lima controller does not work? Is just the Limar or can the disconnection relay be the causer and it comes to the overvoltage because no more consumers are on the Lima? My concern is that I unnecessarily install a new Lima (and new/used disconnection relay) (there is either no new controller or is relatively expensive) or a new disconnection relay and this burns again because of the still existing overvoltage. With all this hope I don’t think the engine control unit can be the cause. I have attached a picture of the separation relay. Who knows each other and how best to proceed? Thank you!