KompressorGpl

Hello! So my c200 kompressor (1997) as a new problem: wen I order the car the central lock don't work. So the guy told me to buy a new key. Back then I think that was very expensive. So the guy told me to put an alarme (from meta). I took the small piece on the key and taped to the ingnicion. Same times the lights falsh, orders don't! But 2 days ago the car dosn't start at all! The ligths fash and with spare key (like a card) I put the car to work. Now the reel question: if i have the imobilizer in place; change the baterrys on the remote and the alarme don't interfeer with that, so wath's apening?
Is a problem with review mirror? Need a new key? Thanks for any reply
And by the way I saw all the web information, and nothing