Battery keeps running down
Just picked up mercedes sprinter diesel in july. have only taken day trips so far. planning a 2 week trip in October. I drove the unit on Friday and today, Sunday, the battery is dead and it won't start. I have taken it to 2 different service places. We think the front radio is wired incorrectly and drains the battery. HELP, we don't know what to do and we can't trust that we won't get stranded somewhere. Has any one else had this problem? Any suggestions?