2006 BMW 750Li • 89,000 miles

My blower motor suddenly stick to one speed on both pad Passenger and driver side, When I push the defrost button dispute goes all the way to the max wish that's the way it's supposed to be but when I controlled manually the power only stuck in one level and it's medium to high now the temperature works good, This happened yesterday I'm at the same time the message came on the cluster that the battery is no in charge recharger drive the car for long period of time could that be related to the problem, Now all of a sudden today start working normal but this evening acting up again, What do you gentlemen suggest
December 12, 2012.

A scan is in order to help develop a repair strategy

Dr. Hagerty
Dec 17, 2012.