Electric window problem

[Emonize]

Hello,

My electric windows don't work as they should!
It's a C200 -95.
When a door is open they work but as soon as I close the door they won't work.

I've tried disconnecting battery for a couple of hours but still not working, I've checked the convenience relay and seems like it's working although no clicks in the relay when I try to open windows with closed doors.

What else should I check?

Thanks in advance!

[Denlasoul]

Check under the trim to see if the button's connectors need a cleaning.

[jnolte]

looks like a bad connection somewhere , follow the wires to the leads and check for corrosion
or splits