My right rear power window failed this morning. The window went down part way and stopped. I heard gears grinding, it sounds bad. I think the gears are powder now.

I looked at the door strap removal procedure in the DIY section and am wondering if my door comes apart in a similar way. I don't remember if I have side airbags back there, but are there any tricks to removing the panel and getting to the motor and gears? I think the motor is fine, are replacement gears available?

I'm embarrassed to ask this: where is my battery located?

I don't like prying on things without knowing what I'm doing. Thanks for your help.

98' E320 4Matic