2020 — 2026
4.0L Bi-Turbo V8 (M177) - Mercedes-AMG GLS 63
Petrol/Hybrid
Check the air suspension by cycling through all ride height settings while stationary. | Note: On cars with these miles, it is worth monitoring for any sluggishness or audible leaks from the compressor as the bags may eventually require attention.
Listen closely for any irregular rattling or ticking during a cold start. | Note: While the M177 is a powerhouse, it is common to monitor the hydraulic lifters or timing chain tensioners for any unusual noise after the car has been sitting.
Evaluate the transmission shifts during low-speed crawling in heavy traffic. | Note: The AMG Speedshift TCT 9G is robust, but it's a good idea to ensure shifts remain crisp, as adaptive learning resets or software updates can sometimes be needed to maintain smooth operation.
Examine the infotainment and MBUX system for any flickering or software lag. | Note: These systems are complex, so it's wise to ensure all screens respond promptly to inputs during your test drive, as software gremlins can occasionally arise with age.
Consider a major service including spark plug replacement and a full driveline fluid flush to keep that V8 running optimally.
A common point to inspect the cooling system components, specifically checking for any signs of seepage from the charge air cooler or water pump.
Ensure the engine oil is changed every 10,000km using the specific AMG-approved synthetic specification.
Check the brake rotors and pads regularly, as the heavy weight of the GLS 63 can lead to faster wear on these performance components.
Verify that the panoramic sunroof seals are clean and lubricated to prevent any potential drainage issues.
Keep the air intake filters fresh to ensure the twin turbos can breathe efficiently.
Keep the vehicle's software up to date at a specialist to ensure the MBUX system functions as intended.
Estimated repair costs if issues arise
If this component needs attention in the future, the estimated cost in NZ is reflective of replacing the air bellows and the active damping sensors.
Depending on the car's driving history, you might eventually need to budget for a complete rotor and pad swap, which is a significant job for these high-performance systems.
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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