Unfortunately, BMW no longer allows buyers to combine the CCA rebate with BMW's group fleet discount program. The group fleet discount program is available to employees from certain companies, plus USAA and AARP members. The group fleet discount is preferable to the CCA discount because it provides $2500 off the purchase of a new vehicle (cash or loan through BMWFS), and for leases it provides $1500 off the purchase price plus a .0002 reduction in the money factor. Until recently, BMW allowed eligible buyers to take advantage of both programs.
The exclusion in combining USAA or the fleet discount has been there as long I I can remember. Never heard of a discount through AARP.