Last week when I bought my 2012 Audi A6 the salesman told me that as the car was an ex demo it had a Cobra tracking system fitted but it was deactivated. Today i received a call from Cobra UK asking if i wanted to reactivate the tracking system at a cost of £138/year or £395 for duration of ownership. I have read some old threads on this subject where some recommended this system and other saying they would not want their car back if it had been vandalised or thrashed and opted for Gap insurance. Any views welcome and is there any saving in insurance prices