[bmwperson]

I did this a year ago, it was fun. I couple tips, call BMW ahead of time they offer a shuttle service but you have to schedule it; it will save you ~60EU of a cab ride.

Plan your trip and don't cram too many activities.
Traffic out of munich sucks(at least it did for me) during morning/afternoon hours
You need to purchase some "required" safety equipment, ~15EU.
Bathrooms in germany are paid, but if you pump gas/buy something then they are free.
Don't speed in the city, there is tons of cameras and they are very well hidden. The cabbie pointed all of them out otherwise they are difficult to see.

Don't watch any YT euro delivery videos, it spoils the fun. Factory tour and museum are really neat.

Whered you get the ED? The guys at elmhurst are great.