I`ve been loving my first Jag, a 2008 2.7d xf, for 8 months now but have noticed that if I sit in the car with the engine off but the radio on, the battery low warning comes on and the radio switches itself off after about 10-15 mins, the car has a Bowers and Wilkins stereo, is this normal as my wife`s Ford and my old Honda would last about an hour? Also, does anybody know of a reasonably priced Jaguar specialist in the Coventry area for servicing and repairs? Thanks