I purchased this 2004 C230 Sedan Sport one year ago with about 56K miles on it. Within a month the CEL came on and required a new engine harness and two O2 sensors to repair. The 1.8L engine had a cam sensor design flaw which leaked oil into the harness (cam sensor seals were replaced under a MB recall by previous owner, but not the oil saturated harness). A month later a coolant pipe began leaking at the rear of the cylinder head (I replaced this myself). Since then, the car has run nicely - although I do get high speed vibration on certain stretches of highway (probably due the the low profile tires). Recently purchased an extended warranty - just in case. Update April 2016: Overall I have been pleased with this car. I performed routine maintenance and inspections since the CEL issues I had shortly after I purchased the car. I serviced front and rear brakes (purchased OEM parts online) - a relatively straightforward job. I discovered a small crack in one of the rear wheels which was replaced with one I purchased used online. So far, I have not had need to use the extended warranty. Update October 2016: Just turned 68K miles. No issues since last update - still running strong.
I purchased this car to be a daily commuter for a one hour one way daily commute. I paid about blue-book wholesale price then spent about $2000 to get all service updates. Almost 50K miles later this car has been fantastic. Comfortable, 30MPG and very quiet on the Interstate. It does like to eat tires and due to the front and rear wheel size difference it is expensive to rotate tires. I am really glad I decided to buy this car over a comparable Camry or Accord
Buyer beware of this piece of crap! The car has had nothing but problems - 3000 kms and it has been into dealer 5 times now. They have had it for two weeks so far. 1st they replaced the fuel injectors, now the kompressor. Wrong kompressor installed by factory - really makes you wonder - Still not fixed! Maybe the dealer is incompetent! No loner offered. I would really think twice before buying another Mercedes. A real Lemon! High end Junk!
Have a 2004 C230 Kompressor Sport Sedan. I'm the original owner and have 257,000 miles on the car. I bought the car for reasons of safety, endurance, looks, and a sporty feel. It's given me everything I wanted. As long as I follow maintenance schedules I expect to exceed 400,000 miles. I've not had any major problems with the car. This is the best car I've had in my life.
I got the C240 with about 89000 miles. Only had one prior owner who supposedly took good care of it. I have had the problem at the shop almost weekly with small problems, like sensor problems, new plugs and coils. Had to get a new AC compressor, rotors, and had many other issues. Now I was told that a problem I had with the climate control system (after getting the compressor and a new climate control unit) is due to some SIMM computer module that controls the programming for the A/C, but also other things like the programming of my second key fob. They say the new unit is $1,200 plus labor and that might not even solve the problem.