This is my 4th Mercedes Benz in 5 years and happy with all of them especially the S550 class equipped with optional versatile features. I have had problems with the computers once in a while but Mercedes take cares of them well. My daily driving experience is great but you have to watch out the gas consumption especially I am driving a 4matic all wheel drive. Watch out the auto gear shifting as sometimes shifting goes to lower gear when shifting to "D" mode.
Dynamic driving is one of my favorite but the pulse mode needs to be modified to a much stronger one but not to the extent of making the driver fall to sleep.
Back bumper needs to be painted well, very thin paint applied over the plastic type bumper, seems like money were spent most likely on computers and some areas of the exterior parts were overlooked.