Yes please do find another dealer. I call BS. Unless the installer did a crappy job, I don't see how a remote starter can be voided. I'm actually looking for a remote starter system to install on my wife's car and dealer quoted me $700 to install...so I figured, why would I pay the middle man when I can go to the place they'd send the car in the first place...I was given a quote of $450 installed. Warranty wasn't even a topic of discussion. Shop around and you'll find what you're looking for.
2004 SL AWD