2010 — 2016
2.1L Turbo Diesel - E220 CDI
Diesel
While driving at low speeds with windows down, listen for any metallic rattling or rhythmic clicking from the engine bay, as this may indicate potential timing chain wear common in high-mileage OM651 engines.
Check the transmission shifting by accelerating gently; if you notice any jerky gear changes or hesitation, it is worth discussing the transmission fluid service history with the seller.
Operate the electronic parking brake and seat adjustments while idling to ensure all motors and sensors respond promptly, as aging electrical modules can sometimes show signs of sluggishness.
After a warm-up drive, check the coolant reservoir and oil filler cap for any signs of milky residue, which can be an indicator that the cooling system or gaskets require a professional inspection.
Consider a full inspection of the auxiliary belt tensioner and DPF health.
Typically the interval where suspension components like control arm bushings may start to show their age on NZ roads.
Focus on the intake manifold flap motor health and carbon cleaning of the EGR system.
Ensure the oil and filter have been changed every 10,000 to 15,000km, as these engines thrive on clean oil.
Verify that the transmission fluid and filter have been flushed, ideally at least once in the vehicle's life.
Check that the air suspension (if equipped) is holding pressure correctly overnight without the car sinking.
Keep an eye on the state of the brake discs and pads, as the W212 is a heavy vehicle that uses them steadily.
Regularly clean the sunroof drains if fitted, to prevent any moisture buildup in the cabin electronics.
Estimated repair costs if issues arise
In cars of this age, it is common to consider the timing chain as a maintenance item rather than a lifetime part. If this component needs attention in the future, the job involves a significant amount of labor to ensure the engine timing remains precise.
If the vehicle has seen a lot of short city trips, the DPF may accumulate soot. Depending on the car's history, you might eventually need to budget for a professional chemical clean or a replacement unit.
If your specific trim includes air suspension, the rubber air bellows can naturally degrade over time. It is wise to set aside some funds for potential replacement of these struts to maintain that smooth Mercedes ride quality.
Noticed something inaccurate or missing?Suggest an edit→
Disclaimer: This report is generated with the assistance of AI analysis based on verified automotive data. While we strive for 100% accuracy, enthusiasts should always conduct physical inspections and consult service records. View Full Disclaimer