I had mine towed, against my wishes, with rear end on ground. Blew apart the rear seal and it lost reverse.

Towing with the front end down can be very hazardous.

For rear-wheel drive. I always recommend a flat bed. It should not cost anymore than a regular truck. If it does, shop around!

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1991 560 SEL / 185k miles
1992 750il / 17k miles - project car