I have a 1989 190e 2.6

My driver front window will not go down.
My BMW has a manual override in case the electric window fails. Does the Mercedes??

Also... I have checked the power window switches, and they seem to be ok.

The passenger (REAR!) window also went out.

Is there a relay for the FRONT AND REAR???

Or is it the motor(s). If it is the motors
where can I find them and what can I expect to pay for them?

Any help is Hugely appreciated.
(I would think that Mercedes would have a manual override for the power windows..... sure hate loosing my stereo/cellphone!!!!!)

Thanks to all who take time to reply!