Wires from the rear seats back going to reverse lights had to be replace. $600.
New key tumbler had to be installed. $650.
New mass air meter installed. $450.
The only real problem with this car was the mass air meter. The wires going to the reverse lights melted because of a lousy CD changer installation by the previous owner. The key tumbler broke because the previous owner carried massive amounts of keys on her key ring.
The car is very comfortable to drive. It has the exact medium of luxury and sportiness. It has plenty of power. (almost 200 hp) The C280 doesn't float while driving yet it is still smooth and comfortable over bumpy roads.
Reliability has been about as good as it gets. I will never worry about being stranded in this car.
Air mass sensors can be installed by kintergartner and cost less than $200.00 if you shop around internet. I see the biggest problem being people who buy Mercedes Benz don't work
on their cars generally. If you buy a car of any brand name,
learn how it works and never get caught paying/complaining about outrageous auto repair bills. This website can be extremely helpful for owners to learn the quirks of theirs car and learn what you can do to prevent the headaches that others have suffered.