I have a 2007 C280 4matic. I replaced both front window regulators at different times. The last one, the front passenger door window goes up and down but does not reset so it makes the ratcheting sound when it gets al the way up, like it is still trying to go up. I have tried to reset it like I did the other one but this one does not reset. Does anyone know what the problem might be?

 

Take a look at the link below, hopefully it'll give you some ideas to troubleshoot. If you still have questions, post a Comment just below the article and we'll do our best to give you specifics.

Mercedes-Benz W203 Front Window Regulator Replacement - (2001-2007) C230, C280, C350, C240, C320 | Pelican Parts DIY Maintenance Article