2015 — 2019
3.0L V6 Diesel - GLE350d
Diesel
Find a clear piece of road and accelerate steadily between 50km/h and 80km/h. Listen for any shuddering or hesitation, as the 9G-TRONIC transmission may occasionally show signs of wear in older examples if the fluid hasn't been serviced.
Navigate over some speed bumps at low speed. Pay close attention to any clunking or knocking noises from the front end, as the Airmatic suspension components—specifically the control arm bushings—can show fatigue over time.
Park on a flat surface and inspect the underside near the back of the engine. Look for signs of oil weeping or staining, as the oil cooler seals are a known spot that can develop minor leaks as the vehicle ages.
Activate the infotainment screen and scroll through all menus while stationary. Ensure the rotary dial controller feels firm and responsive, as these units can sometimes become temperamental due to wear or moisture exposure.
Time to consider a transmission fluid flush and filter change to keep the 9-speed gearbox shifting smoothly.
Generally the point where suspension air struts may begin to show signs of age; regular checks are recommended.
Consider having the DPF (Diesel Particulate Filter) inspected for ash accumulation to ensure the emissions system remains efficient.
Stick to a strict oil change interval using high-quality synthetic oil to protect the V6 turbo internals.
Ensure the cooling system is flushed according to the manufacturer's schedule to prevent internal corrosion.
Periodically clear the drainage channels near the windscreen to prevent water ingress into the cabin electronics.
Check the brake fluid condition every two years, as this is often overlooked but crucial for safety.
Keep the AdBlue tank topped up to avoid any 'no-start' conditions programmed into the engine management system.
Estimated repair costs if issues arise
If the car remains parked for long periods and looks 'sunk' on one corner, you might eventually need to budget for strut replacement as they can lose their ability to hold pressure over many years.
This is a common maintenance item involving significant labour to access the deep 'V' of the engine. If this component needs attention in the future, it is wise to do it proactively during a major service.
Depending on the car's history, you might eventually need to budget for a solenoid or valve body service if shifting starts to feel inconsistent or sluggish.
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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