Window, Rollbar & Top controller trouble

[cathystm]

Hi- I posted this on the regular Tech forum and someone suggested I post it on this (the SL) forum.
Glad to know it exists! I need a 'second opinion'.
I have a 1998 500 SL. The battery went dead, recharged it to get it to a shop to get a new battery. New battery was installed, car completely reset (w/MB equipment) Every time it is started, the lights for the rollbar, and top (warning) come on and stay on. Neither works. Windows don't work either. Radio is frozen. All fuses have been checked and they're OK. The shop told me I needed a new 'computer' @ close to $3K. Can anyone tell me the correct name/term for this 'computer' part that I need and where I can get an aftermarket one IF available for a lesser amount? The car runs great otherwise. Thank you for any and all help.