2002 BMW 745I User Comment / Complaint

I leased this vehicle june/2002 and have had constant aggravation and frustration by the numerous failures of this car, this car has been at the bmw service center 6 times in the year i have had it -- 3 times for the engine failing to start,leaving me stranded at night in unfamillar and dangerous areas-- 2 times this vehicle had to be towed to dealer at night, each time waiting more than 3 hours for bmw assist to have a tow truck come and get car -most recently i waited more then 4 hours -- i do not feel safe driving this car as i don't know when it will brake down and not start. please help me !!