ELECTRICO ELECTRICAL FAILURE RENAULT MEGAN II CONF

Recently the front windows have begun to make a strange noise, to raise and lower with difficulty until it has stopped and has been left down. The repair goes to € 300, you know of some kit/trick that checked the disaster. The companion's window is already queuing to repair. I know it is a "common" problem in this car and there are € 20-25 kits, but someone has experience in this regard. Thank you all.