The lock/actuator is frozen/rusted and needs lubed or replacing. Any collision/body shop can fix this for you some auto glass replacement companies do this type of work as well.
My BMW 328ci won't go in reverse. I took it to the dealer and it worked they flushed the...
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My BMW 328ci won't go in reverse. I took it to the dealer and it worked they flushed the transmission and sent me home it worked for a few days and now won't reverse again