While I am waiting to get into the engine this weekend, I am trying to troubleshoot the other minor problems in my 89 300E. Got the car Friday. Passenger side window worked only. Replaced fuse (someone had installed an 8 - requires 25

) for Driver F and Pass. Rear - Got Driver only. Yes, I checked to make sure the child lock was off

. Could it be that the child lock is faulty or more likely that both back motors are out? Any other usual problems I should check on this model? Kids? Neither makes noise like it's even trying to go when the button is pushed.
Thanks for any help...