Help please. Wife's car is misbehaving and my quality of life is being drained through constant pressure to fix. Indicator lights flash randomly, but luckily no alarm sounding. Car locks when a "beep" is heard after pressing fob 3 or 4 times, otherwise the light problem returns. Please notethat we have recently removed Merc radio and replaced with Sony and hence steering column controls for radio don't work and hence wiring BUS has been interupted. Any thoughts? Whichcontrol unit interfaces with key-fob and where is it located as I don't want to pay a main dealer $200 for a simple fault code when this problem must have occured before! Thanks in advance,

Rees