 After owning Lexus and BMW I was excited when MB offered the E500 4- matic.  This vehicle has been nothing but a disappointment.  The transmission is not smooth and overrevs. At times there is a delay when starting to accelerate that is unpredictable and dangerous.  The braking system is noisy and very hard to adapt to in order to come to a smooth stop. The a/c system is a joke. When it starts to run on hot day it revs so loud people outside the vehicle stare thinking something is wrong.  I have had this car back to the dealer numerous times and I am always told that is just the way the car is!  I would never recommend this vehicle.