Be careful what BMWNA tells you. Go to your dealer and talk to them and see what they say. BMW NA Customer support has frequently given out bad advice that was just plain wrong. My experience has been that they are staffed by young cocky kids with little actual knowledge. In one case I know of the rear door airbags of a BMW needed to be deactivated due to the use of a child seat and BMW NA customer support rudely said that they wouldn't pay for it. This was 10000% wrong and proven wrong with a BMW service bulletin. The dealer did the work and the person was 100% reimbursed for the cost.