kids car just quit, no power at all. has had power drain and fuse issues in past but this time it seems fried. no action w/ key on, no lights, tried to jump w/ my big SUV, tried another battery. any clues out there - main fuse link or something? I don't even know where to start on this??? thanks in advance

 

i had this problem with a honda it was the main fuse in a case of the 190, i am not sure. the s class has a lot of wireing issues the wire harness specialy 92 93 and the 94 modell