Not one of the Z4's better features - I always let mine warm up first and then try to take a reading when the car is on a flat surface. Never had it say anything other then 'OK' though - hope its working!!!
Hi. Here is a photo of my new Z4C bought just weeks ago. In fact its not my first Z4C as I had an almost new one back in 2006 - I really enjoyed that car and was very sorry to see it eventually go. Since then I've had a number of different cars including a Cayman and a 911 and most recently a...