I have a 1997 A4 1.9tdi 90bhp. I got it a few weeks ago it came with the 2 master keys the plastic key and the tag with a number on it but no bar code. Should it have a transponder/remote ? If I get one can I code it to work with my car or does the dealer have to do it. I have seen the ones with the filp out key for not to much money and would love to have one. Many thanks for any information regarding this.