2002 Other Mercedes Benz Models Front passenger side window

If you here a ticking sound the motor is working. More than likely you have a failed regulator. The motor would not be allowing the window to lower if it were dead and it would not be ticking either. Hdere is the thing about MB regulators, they are riveted in and you will need to drill out all rivets and will need an air riveter to install the new rivets. Do you have this equipment? Let me know and I will walk you through the replacement process.

It usually will happen every time but if the cables are binding on a roller or have slipped off a roller you may get a little function every now and again as the cables have time to sit and relax the pressure on them. If you know your switch is good and the motor is runningh the regulator is going to be your problem. What I would suggest is taking the door panel off, leaving the window switch connected and watch and listen to the regulator as you try to roll it up. If you here the motor running but no movement watch the regulator for binding. Also with the window switch not pushed grab the regulator and try and feel the tension on the regulator cables. If the cables are very tight then something is bound in the regulator. Really the window systems are very good on this vehicle and the only problems usually seen with these windows is either a worn out motor or failed regulator. In fact in my 6 years with Benz I can't think of any other components I have replaced other than these two and switches to fix window issues.