Is it transmission or something electrical? Is it worth fixing?

What is your question?

2002 Mercedes-Benz ML320 Sport with all the bells and whistles: Left sunroof open and it rained on center console. Took to get repaired and it was fine for a week. Electrical (dash screen, radio and cd) was working, but radio would short out (while driving) and I would have to turn it off and then on again to get it to work. Then, it started whining while driving. Then when I tried to put it in park, the gear shift stopped at reverse ( almost like it was stuck or something was keeping if from shifting to park) and I would have to turn the car off, THEN it would let me put the car in park. The whining noise is accompanied by vehicle hitting 4 rpm while driving 25 mph. The shop I took it to for the water damage said it'd be another $1500.00 just to look at it and it's been sitting for a year because there isn't another Mercedes-Benz mechanic in the area.

How long has your 2002 Mercedes-Benz ML320 had this problem?

Car has been sitting for a year