My MB E430 had same issue with all four windows after battery was temporarily disconnected to resolve another issue. After checking fuses and determining none were blown, I investigated and learned that the power windows on a MB need to be re-sync'd after power interruption.
check fuse
power or manual?
Buy a lubricant apply it to the windows sides were the glass windows connects & try pulling it up & down
the window motor might be bad or there is not of power in your cords to power it
window make a noise, but won't roll down
Since both windows on the front of the caravan do not work it is a common power issue. Check the window fuse and relays first, to see where the power loss is.
I had the same problem on mine and inside the motor all the plastic pieces were gone so I had to go to Auto zone and buy the parts to fix it.
It depends what is wrong with them.
The plastic pins are worn out inside the motor very cheap to fix very labor intense.
MY car is a 2000 LS Buick Regal the back windows won't work but, the front one still work. Can you tell me how to fix them
Probably need to replace the window regulator.
where is the fuses for the power windows