2018 — 2026
2.0L (M274) Turbo - Luxe/Sport
Petrol
During low-speed maneuvers, listen for any clicking or clunking from the front end, as the steering rack and suspension bushings may show signs of wear as these vehicles age.
Check the infotainment system by cycling through the dual-screen interface; ensure there is no lag or screen flickering, as the 'InTouch' system can occasionally experience software glitches.
While driving in stop-start traffic, pay attention to the 7-speed automatic gearbox; ensure shifts are smooth, as jerky transitions can sometimes indicate that the transmission fluid or valve body may eventually require attention.
Before starting, pop the hood and inspect the area around the turbocharger inlet; check for any oil misting or weeping, as this is a common point to monitor on the M274 engine platform.
Consider a full transmission fluid service and spark plug replacement to maintain engine efficiency.
A good time to inspect the cooling system hoses and the auxiliary drive belt for signs of cracking.
The major service point; look into replacing the water pump and checking the integrity of the turbocharger oil lines.
Stick to high-quality synthetic 5W-30 or 5W-40 oil, ensuring it meets the Mercedes-Benz 229.5 specification required for the M274 engine.
Keep a close eye on your brake pad wear sensors, as they are quite precise on this model and will let you know well in advance when service is due.
Regularly clean the sunroof drains if your model is equipped with one, as this is a simple way to prevent interior moisture buildup during our wetter NZ months.
Ensure the engine air filters are replaced on schedule to keep the turbocharger intake path clean and efficient.
Check your tyre pressure regularly, as the direct TPMS system is sensitive and prefers keeping pressures within the manufacturer's suggested range.
Estimated repair costs if issues arise
In cars of this age, the electronic coolant pump can eventually reach the end of its service life. If you notice the engine running slightly warmer than usual or a low coolant warning, this will be the likely culprit. Budgeting for this ensures you aren't caught off guard.
Depending on the road conditions the car has faced, the front control arm bushings may eventually lose their firmness, leading to a vague steering feel. Replacing these will restore that sharp, premium handling feel.
Because the dual-screen system is highly integrated, should the control module require a factory reset or replacement, it is a specialized job. It's wise to keep a small buffer in your maintenance fund for potential electrical diagnostics.
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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