2012 — 2014
1.8L OM651 I4 Turbo - B 200 CDI
Diesel
While at a complete stop in Drive with your foot on the brake, feel for any vibration or hesitation. | Description: It is worth keeping an ear out for engine mounts that may have reached the end of their service life, as these can contribute to cabin vibration in the W246.
When accelerating gently from 40km/h, listen carefully for any 'fluttering' or 'hissing' noises. | Description: In some cases, the turbocharger boost hoses can develop minor splits, which might impact performance and fuel efficiency.
Test the DCT transmission by shifting between Drive and Reverse multiple times while stationary. | Description: Notice if there is a noticeable delay or 'clunk', as these dual-clutch transmissions benefit from regular fluid servicing to maintain smooth engagement.
Check the instrument cluster for any warning lights, particularly after the engine has warmed up. | Description: Occasionally, sensors related to the DPF (Diesel Particulate Filter) can trigger alerts if the car has mostly been used for short city trips.
Usually the point for a comprehensive transmission fluid service and potential inspection of suspension bushings.
A common window where the DPF and EGR valve may require a professional cleaning or inspection to ensure continued efficiency.
Consider having a qualified specialist inspect the timing chain tensioner and auxiliary belt components.
Verify the service history specifically for DCT transmission fluid changes.
Ensure the engine oil is a manufacturer-approved specification for the OM651 engine.
Check that the cabin air filter has been changed to keep the climate control fresh.
Test all electronic features, specifically the infotainment controller, as it sees heavy use.
Confirm that the brake fluid has been flushed within the last two years for optimal stopping safety.
Estimated repair costs if issues arise
Regular fluid and filter changes are vital for this transmission's longevity. If you are nearing the recommended service interval, it is wise to set aside funds for a specialist technician to perform this maintenance.
If you notice a loss in power over time, it may be due to aging rubber hoses. Replacing these can restore the engine's responsiveness and prevent further stress on the turbo.
If the vehicle is used mostly for short commutes, the diesel filter may eventually need a forced regeneration or professional clean to keep the system happy.
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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