2014 — 2019
2.0L M274 Turbo - 200GT-t
Petrol
Check this by listening for any rattle during cold starts; the Mercedes-derived M274 engine occasionally displays timing chain tensioner sensitivity, so ensure the engine is stone-cold before you start it.
While driving at low speeds, observe the transmission behavior; the 7-speed automatic can occasionally feel a bit 'grabby' or hesitant if the transmission fluid has not been serviced regularly.
Test this by cycling through the infotainment and drive modes; the V37 relies heavily on electronic steering and throttle systems, so ensure all steering modes engage without warning lights appearing on the dash.
Inspect the turbocharger inlet pipe by checking for signs of oil misting or weeping; while not an immediate failure point, it is common to see minor seepage in these units as they age.
Consider a full transmission fluid service and spark plug replacement to keep the turbo engine running efficiently.
This is a sensible point to inspect the cooling system components, specifically the water pump and thermostat housing, which are known to be standard wear items on this platform.
Review the condition of the turbocharger hoses and vacuum lines, as the heat cycles can cause rubber components to become brittle over time.
Always use high-quality European-spec synthetic engine oil, as the M274 is quite specific about oil chemistry.
Keep a close eye on your coolant levels, as the overflow reservoirs on these models can sometimes develop hairline cracks.
Ensure you are using 98 octane fuel to help the direct-injection system stay free of carbon deposits.
Regularly clean the mass airflow sensor to ensure the ECU maintains the correct air-fuel mixture for the turbocharger.
Keep up with brake fluid flushes to ensure the sensitive electronic brake assist systems continue to function optimally.
Estimated repair costs if issues arise
If this component needs attention in the future, it is a significant job due to the engine orientation. Budgeting for this ensures you aren't caught off guard if the engine develops a rhythmic ticking sound.
Depending on the car's driving history, you might eventually need to budget for a walnut blasting service to clean carbon buildup off the intake valves to restore throttle response.
These secondary pumps occasionally fail as they age; having funds set aside for this will mean you won't be stressed if you notice a small coolant drip or an overheating warning.
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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