2020 — 2026
4.0L V8 Bi-Turbo (M177) - Mercedes-AMG GLS 63 Performance
Petrol
While at a standstill and during low-speed maneuvers, listen carefully for any 'clunking' or creaking noises from the air suspension system. | Note: The E-ACTIVE BODY CONTROL is incredibly complex; hearing unusual sounds could suggest the early stages of wear in the suspension struts or bushings.
Accelerate briskly from a stop and observe the gear changes through the 9G-TRONIC transmission. | Note: While generally robust, these transmissions appreciate smooth shifts. Any hesitation or harsh engagement might indicate that the gearbox requires a software reset or a fresh fluid service.
Check the MBUX infotainment screen and instrument cluster for any flickering or software glitches while cycling through drive modes. | Note: These units are highly digital; ensuring the software is up to date is key to avoiding communication errors between the various onboard control modules.
After a spirited drive, safely pull over and check for any uneven heat or smells near the front wheel arches. | Note: The high-performance braking system generates significant heat; ensuring the rotors and pads aren't displaying signs of premature warping or heavy uneven wear is a good sanity check.
Consider a comprehensive transmission fluid flush and differential oil change to maintain performance.
A common point for a thorough inspection of the air suspension compressors and control arms.
Typically the interval where spark plugs and high-performance coil packs are assessed to ensure the V8 Bi-Turbo continues to run efficiently.
Prioritize strict adherence to the manufacturer's oil change intervals using only high-grade synthetic lubricants.
Inspect the auxiliary battery health, as these cars rely heavily on electrical stability for the Mild-Hybrid EQ Boost system.
Keep an eye on tire condition; the weight and torque of the GLS 63 can lead to faster-than-average wear on the inner edges.
Ensure the cooling system is topped up and clear of debris to protect the turbochargers from heat soak.
Regularly update the MBUX system at a certified specialist to keep navigation and driver-assistance features functioning optimally.
Estimated repair costs if issues arise
Given the sophistication of the adaptive suspension, it is common to consider that these components may require renewal as the vehicle reaches higher mileage. This ensures the ride remains as smooth as the day it left the factory.
These large, high-performance discs are essential for stopping such a powerful vehicle. Depending on the car's driving history, you might eventually need to budget for a complete set of performance rotors and pads.
The 48V integrated starter-generator is a core part of the powertrain. If this component needs attention in the future, it is a specialized repair that should be factored into your long-term ownership planning.
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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