2013 — 2018
2.0L M270 - B250
Petrol
When cold starting the vehicle, listen carefully for a distinct rattle from the engine bay, as early M270 engines can sometimes develop timing chain tensioner wear over long periods.
Put the transmission into manual mode and shift through gears 1-3 while accelerating gently; observe for any hesitation or 'clunky' shifting which might suggest the 7G-DCT transmission needs a fluid service.
Turn the steering wheel to full lock in both directions while stationary to feel for any binding or clicking noises that could indicate potential CV joint or steering rack wear typical of vehicles in this age bracket.
Operate the panoramic sunroof if fitted; observe it opening and closing in one smooth motion, as the mechanisms can sometimes accumulate debris or require lubrication in our local climate.
Usually marks the point where the 7G-DCT transmission oil and filter should be refreshed to ensure smooth future operation.
A common interval for inspecting the thermostat housing and water pump for signs of seepage or degradation.
Consider having the spark plugs and auxiliary drive belt inspected or replaced as part of your proactive maintenance plan.
Check the service history logbook specifically for regular engine oil changes, as these direct-injection units thrive on clean, high-quality synthetic oil.
Inspect the coolant reservoir for any signs of discolouration or oil residue, as a healthy cooling system is vital for the M270 engine's longevity.
Take a moment to verify that the air conditioning blows cold consistently, as condensers in these models can occasionally suffer from stone damage or debris buildup.
Confirm the electric parking brake functions quietly and releases promptly when you pull away.
Look under the vehicle for any signs of oil dampness around the transmission housing, which is a good habit for any pre-purchase inspection.
Estimated repair costs if issues arise
While the dual-clutch transmission is efficient, the fluid and filter are essential maintenance items. If this hasn't been done, you might eventually need to budget for a specialized service to keep the gear changes crisp.
In cars of this age, the plastic cooling components can become brittle. If you notice the temperature gauge behaving unusually or a small coolant leak, it is wise to plan for a refreshed housing and pump assembly.
Considering our New Zealand road surfaces, the rubber control arm bushings and engine mounts can experience wear. You might eventually need to budget for a suspension refresh to maintain that signature Mercedes ride quality.
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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