Uhoh. Sounds like problems which cropped up with early E60's.

If I were you, i'd start noting the problems. (What happened, how often). Get your dealer to try and fix it. And then keep track of the service records...

I'm hoping your E70 isn't a lemon, but if it is, careful paperwork would make the whole process a lot simpler.

Although the mechanical parts themselves might be just fine, it has been documented how bad computers can destroy perfectly good mechanical parts (i.e. transmissions). So, I'd take it to the shop. A tranny error is pretty serious.

Perhaps you could get your CCC or ECU replaced. Although I think the dealer would take that as a last resort measure.

Anywho, hope you have a good relationship with your service advisor ! & keep us posted...