That's why both dealers and BMWNA told me to use a trickle charger or battery tender. If you want to start a class action suit, I would like BMW to buy back my vehicle for this and a parts availability problem. I drove around for 3 months with a check engine light waiting on a part. I also had the heated fuel filter go bad and waited 5 weeks. Both times, I had to get BMWNA involved in order to receive parts for my vehicle. I've asked them to buy my vehicle and they declined. I'm waiting on a compensation check from BMWNA right now. It only amounts to a small amount of money. I don't consider it a fair amount of compensation. BMWNA says I have to drive my car daily at highway speeds in order to keep my battery charged. I find this unacceptable for a modern vehicle. Please let us know what they tell you. I already had someone tell me on the Lexus board they saw my posts and decided to purchase a new Lexus GX 460. They leave their vehicle at the airport for ten days at a time and were worried about not being able to start the X5d when they returned. If I had known I had to keep my car on a battery charger every night, I wouldn't have purchased this vehicle.

Craig