2012 — 2015
ML350 BlueEfficiency 3.5L V6
Petrol
While parked on a flat surface, listen closely for any rattling or ticking from the engine bay upon cold start, as this can sometimes indicate early signs of timing chain tensioner wear.
Cycle through every suspension height setting while stationary, then drive over a few speed bumps to ensure the AirMatic system raises and lowers smoothly without warning lights appearing on the dash.
Observe the transmission shifting behavior; ensure that the 7G-Tronic gearbox transitions between gears without any jerky hesitation or 'thumping' sensations when coming to a stop.
Navigate a tight, slow-speed turn in a parking lot while listening for any clicking or binding sounds from the front end, which may suggest the CV joints or control arm bushings are nearing the end of their service life.
Usually marks the time to consider a transmission fluid and filter flush to maintain optimal shift quality.
Often the period where the AirMatic suspension compressor and struts may begin to show their age and require inspection.
Consider having the engine's auxiliary belt and tensioners inspected, as rubber components of this age can become brittle.
Ensure the Service History shows regular oil changes using the correct Mercedes-approved synthetic oil, as this V6 engine appreciates clean lubrication.
Check for any signs of dampness in the footwells, as a clear sunroof drain is essential for protecting the interior electronics.
Verify that the software updates for the transmission control unit have been performed, as these can significantly improve gear-change refinement.
Inspect the condition of the brake rotors and pads, as these heavy vehicles can be quite hard on consumables.
Confirm that the most recent WOF was straightforward and that no advisories were noted regarding suspension or steering play.
Estimated repair costs if issues arise
If this component needs attention in the future, the estimated cost in NZ reflects the specialized nature of the air struts and the compressor pump. It is common to budget for potential replacement of a strut or the pump after a decade of use.
Depending on the car's history, you might eventually need to budget for a full transmission flush and filter kit to keep the shifts silky smooth.
While not a regular failure, if the engine displays startup noise, it's worth planning for a professional inspection and potential timing component refresh to preserve engine longevity.
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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