2013 — 2018
1.5L OM607 I4 - B180 CDI
Diesel
Listen closely to the transmission during slow, stop-start traffic to feel for any hesitation or judder, as the 7G-DCT dual-clutch can occasionally show wear in high-mileage examples.
While parked on a flat surface, turn the steering wheel lock-to-lock to ensure there are no clicking or groaning noises, which helps identify potential steering rack or suspension bush fatigue.
Check this by turning on the air conditioning to its coldest setting for a few minutes to ensure the compressor engages smoothly and blows ice-cold air, as B-Class systems can sometimes lose efficiency over time.
Inspect the dashboard for any persistent warning lights, specifically checking that the 'Check Engine' light illuminates briefly upon starting and then disappears, as the OM607 engine management system is sensitive to sensor health.
Consider a full transmission fluid and filter flush to maintain shifting smoothness.
Time to inspect the timing belt (if applicable to your specific VIN) and auxiliary drive components for signs of perishing.
Likely window for checking the diesel particulate filter (DPF) health and ensuring the EGR system is clean for optimal emissions performance.
Ensure the oil has been changed at least every 15,000km using the specific Mercedes-approved low-ash synthetic oil.
Verify the coolant has been flushed recently to prevent internal corrosion of the cooling system.
Keep a close eye on your brake pad and rotor thickness at every service interval.
Regularly clean the cabin air filter to keep the climate control system operating at its best.
Always check that all software updates for the vehicle's ECU have been performed by a qualified technician.
Estimated repair costs if issues arise
If this component needs attention in the future, it involves electronic and hydraulic repair. Depending on the car's history, you might eventually need to budget for specialist diagnostics and potential actuator repairs.
In cars of this age, the DPF can accumulate ash. If the vehicle is mostly used for short city trips, it's common to consider a professional deep clean or, in extreme cases, a replacement to maintain fuel efficiency.
Given NZ road conditions, it is common to consider replacing suspension bushings as they age, which helps restore the 'Mercedes ride' quality and ensures even tire wear.
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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