hi all, im new to this site and need some good advice, i have recently purchased a BMW 318is auto on a 96 plat, i noticed today while driving along the motorway that my car was vibrating a bit, im doing 70mph at roughly 3400rpm and the car sounds as though its in 4th, am i hearing thing or do you think i might have a problem with my BM, i would be very greatful for any advice....thnx in advance P.S one more thing i nearly forgot, the car occasionally NEARLY stalls when coming to a stand, then when i stop it jumps back up to about 800 rpm