I feel your PAIN ! ! !
I read an article about this same problem with a other BMW owner. He had taken his car thru a car wash and it did the same thing yours did.
His problem was he need a new computer. I'll try and find the link about this article for you. I just replaced my computer in my 325I and it was around $700.
I'll get back to you later. . .
Sorry I wish I had better news for you. . . .
Skycity_BMW
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