Hello everyone. Long time BMW owner, first time poster. Our family of four is taking a trip to Germany for a couple of weeks this summer and I'd like to rent a 3, 5 or 7 Series for the travels. I'm aware there are rental outfits that will rent you a luxury sedan but is there one that will ensure you get a BMW and not an Audi, Benz, Opel, etc? Is there an option of renting through a private party? Please advise. Thanks!