6 miles on 100% full charge seems a bit low. What is your weather and driving conditions?Just got my X5 e40. My EV range seems very short--only 6miles. The battery went down so fast. Do the car has any issue?
The major drains on the high voltage battery other than the motor are heating/cooling the passengers and heating/cooling the high voltage batteries. Do you set schedule your car to automatically precondition and acclimate the car? It starts around 3 hours before the set time and pre heats/cools the car using the plug in electric which means less expenditure of the high voltage battery when driving. HOWEVER, I have noticed that prior to the March 2017 firmware update, on a cold day, even 240 VAC 16A electric is not enough to fully precondition my X5 40e. If I scheduled departure time at 6:30 am and actually drive off at 6:30 am on a below freezing day, the battery might only be around 80-90% charged. Then after the firmware update, in similarly cold conditions, the car would indicate 100% fully charged. I have always wondered whether the battery was actually fully charged or whether it was just indicating full charge when it isn't. My personal habit is to schedule the time about 15-20 mins earlier than actual departure to give the battery a little extra charging time.