The MA's had a few electrical niggles but I haven’t heard of any MB's having the problem. My
BCM (body control module) failed at about 3 months old, my dealer picked the car up on a tow truck, gave me a car to drive while they fixed mine, had it back 24 hours later, 70,000 k's later and I haven’t had an ounce of trouble with the car since.
Great car, mines up for replacement mid next year and I will be sad to see it go.