Hi I have a 2008 BMW 535i and lately I have been getting a TRANSMISSION MALFUNCTION MESSAGE. The car will start up fine when cold and I am able to drive it. While driving the car for about 15 minutes which include stopping/going at stop lights the car seen to run fine, However after coming to a permanent stop and put the car into (P) park mode, then later shift to (R) the transmission would automatically shift itself back to( P). the same thing would happen when I put the car into (D) drive mode. if I turn the car off, then restart the car, now I am now able to put the transmission into (R) or (D) mode, at this time the car will reverse or go forward at times but at reduced power. Does anyone experience this issue or know what causes the transmission to malfunction,thanks for your help..