Picked up 2010 E550 4matic
But I just drove my 550 30mile today.Ride of 550 is little bit smoother than 350 and handling(cornering) is about same. 550 has less road noise from tires. As it looks like 350's tranny slips little bit more than 550 when starting from dead stop, it shows very smooth starting.
But idling(gear is in D) of 350 at dead stop is much smoother than mine.

Mine having some more micro vibration and it bothered... I don't know why.
Maybe my E550 needs to have time to break-in?







!!
