I read the manual for the car online. And the procedure does not work. I did about 4 or 5 different techniques that I read online and they did not work.

I called the mercedes dealership and they said it sounds like it's coming from a leak in the vacum pump or the line. If this is the case I WILL BE PISSED. For some reason I have a feeling this might be it, since this is my luck and I just had the pump replaced at a shop not even 2 days ago.

Im still hoping that someone responds and tells me a way to re-sync the key or if it could be a certain number fuse problem? I'm stressing out so much about this.

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1992 SEL 600..... 143,000 miles