1991 Mercedes-Benz 420SEL Q&A

1991 Mercedes-Benz 420SEL Question: while in the hospital --battery went dead--was told not to jump or charge

but was told i could cause more issues by jumping or trying to charge the batt -
Answer 1
that is some bad information jump it or charging the battery wont hurt anything -
Comment 1
thanks for the help im taking it out now to replace it--charged it up car runs-- now i dont have power windows and my light sw dont work,and my ABS light stays on any ideas fuses look good -
Comment 2
its going to take some time for the ecm to learn all computer controlled equipment -
Comment 3
well two main things windows and lights--the light switch wont even turn--start to think some moisture got to it or something --going to try and pull it today if the rain stops--been two days car runs fine but the two things have not changed--dont even know where to start with the windows -