BenzVince

I have three question about the rear regulator, that my 96 E320 on the rear driver side went out. I have a hard time finding a regulator without a motor. My question is that the 98-00 uses the same regulator as the 96? The second question is the passenger and driver rear side are interchangable with the regulator, somewhere I read but I never really check to see for myself. The last question is, since there isn't a regulator you can buy without the motor, that you have to buy that comes with a motor, why is that?