2013 — 2018
1.5L OM607 I4 Turbo - B 180 CDI
Diesel
Check the gear changes while driving at low speeds | Observation: In cars of this age, it's common to consider the health of the 7-speed DCT transmission; observe if there is any hesitation or 'shuddering' when pulling away from a standstill.
Monitor the dashboard for warning lights during a cold start | Observation: Ensure no Check Engine lights persist, as the OM607 engine relies heavily on its DPF system, which can become sensitive if the vehicle has historically been used only for very short urban trips.
Listen for rattles or clicking sounds from the engine bay at idle | Observation: Check the condition of the auxiliary belt tensioner and pulleys, as wear here is something to monitor on high-mileage examples of this specific Renault-derived engine.
Inspect the door seals and footwells after a wash or rainy day | Observation: Be mindful of moisture ingress, as the W246 seals can occasionally degrade, which is a common area to keep an eye on to maintain the cabin's integrity.
Consider a full transmission fluid and filter service if not already documented.
This is a great time to inspect the suspension bushings and verify the health of the glow plug relay.
Keep an eye on the turbocharger inlet hoses for any signs of perishing or oil weeping.
Stick to the strict Mercedes-Benz oil specifications to keep that OM607 engine running smoothly.
Ensure the cabin air filter is changed regularly to keep the interior climate control fresh.
Check the coolant levels periodically as part of your general under-bonnet safety checks.
Verify the brake fluid has been flushed every two years to ensure optimal pedal feel.
Keep a consistent log of your fuel filter replacements to protect the common-rail injection system.
Estimated repair costs if issues arise
If the transmission control unit requires attention in the future, it is a complex electronic repair. Depending on the car's history, you might eventually need to budget for professional diagnostics and potential module replacement.
If this component needs attention in the future due to soot accumulation, the estimated cost in NZ covers either a specialized chemical clean or, in worst-case scenarios, a physical replacement unit.
Over New Zealand's varied road surfaces, suspension components naturally wear. You might eventually need to budget for refreshed control arm bushings or dampers 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