Valve guides tend to wear in higher mileage cars, which causes compression loss in the engine. This leads to a loss in fuel economy or performance. Replacing the guides, which requires cylinder head removal, may solve the problem or a new cylinder head may be needed.
Car problem reports
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Most reported 2003 Mercedes-Benz C230 problems
The sway bar end link joints may wear and cause a knocking noise over bumps. Loose or warn links should be replaced to correct this type of noise.
The SRS (airbag) light can come on if liquids are spilled into the seat belt buckles, or if the liquid pools underneath the seat and gets into the electrical connector for the seat belt pretensioner. Damaged components will require replacement to restore proper airbag operation.
The engine crank case vent hoses may fail, resulting in a rough running engine and/or poor engine performance. Damaged hoses should be replaced.