We Starmarked this car when we bought it just to be safe, but haven't had to use it more than once (cracked intake hose - replaced with no problems). Dealer has been outstanding. This car is very comfy and very safe - I'm very pleased my wife and child spend time here. Factory Continentals stink, but that's a minor issue. Overall, we're pleased. This is our second MB, and I'll continue to drive them as long as they keep the faith.
Good road manners, good brakes, nice understated lines. 320's have decent power with good fuel consumption.