2012 — 2016
3.0L V6 (OM642) - GL 350 BlueTEC Diesel
Diesel
Check the air suspension leveling by setting the vehicle to its highest position while idling. | Observation: Listen for the compressor running excessively long or failing to lift, which could indicate a tired pump or a leak in the air struts.
Perform a 'cold start' inspection by arriving early to ensure the engine hasn't been pre-warmed. | Observation: Listen for any timing chain rattle or hesitation, as the OM642 engine can show wear in the timing chain tensioners over significant mileage.
Evaluate gear changes during low-speed, stop-start driving. | Observation: The 7G-Tronic transmission should be smooth; any hesitation or harsh shifts might suggest the transmission control module or fluid needs a professional assessment.
Inspect the underside for oil dampness around the 'V' of the engine block. | Observation: The oil cooler seals are a known service point on the V6 diesel; keep an eye out for signs of oil weeping in this area.
Usually marks the window for transmission fluid servicing and a thorough inspection of suspension bushings.
Often the time when items like the AdBlue pump and injectors may require professional diagnostics to ensure optimal performance.
Consider a comprehensive review of the entire cooling system, including water pump and thermostat, to maintain engine longevity.
Prioritize a strict oil change interval using high-quality synthetic oil to protect the complex turbocharger system.
Keep a close eye on AdBlue fluid levels, as the system can be sensitive to crystallization if not used regularly.
Ensure the DPF (Diesel Particulate Filter) is functioning correctly by ensuring the vehicle gets regular highway driving stints.
Schedule an annual inspection of the panoramic sunroof drainage channels to prevent water ingress into the cabin electronics.
Verify that the battery is in peak condition, as these SUVs have sophisticated electronic modules that can behave erratically with low voltage.
Estimated repair costs if issues arise
Since air bags and compressors are wear-and-tear items, you might eventually need to budget for a replacement of one of the four corners or the central pump as they reach the end of their service life.
This is a labor-intensive job because of where the cooler is located. If this component needs attention in the future, it is best handled by a specialist who can clean and reseal the area properly.
Depending on the car's history and the types of trips it has taken, you might eventually need to budget for professional cleaning or sensor replacement to keep the emissions system happy.
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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