2020 — 2026
4.0L V8 Bi-Turbo Petrol/Mild Hybrid (M177) - GLS63 AMG Performance
Petrol
Gently engage the 48V EQ Boost system in Comfort mode and listen for any hesitations or jerky gear shifts, as the integrated starter-generator system is complex and sensitive to software calibrations.
Cycling through all suspension height settings while the car is idling; listen for any persistent hissing or delayed leveling, which may indicate the air suspension struts or compressor are beginning to show their age.
Navigate over a series of minor bumps and listen for light clunks from the front end, as the sophisticated AMG Ride Control+ setup features many bushings that can eventually wear down under the vehicle's substantial weight.
Testing the MBUX infotainment screen responsiveness and camera views; ensure the augmented reality navigation and screen transitions are smooth, as these high-tech clusters can occasionally experience glitches that require dealer-level diagnostics.
Usually marks the first major service interval where spark plugs and cabin filters are typically due.
A common point where brake pad and rotor wear becomes a significant consideration, especially given the GLS63's performance braking requirements.
The period where auxiliary drive belts and cooling system components are often evaluated for long-term health.
Ensure the oil changes are strictly adhered to every 10,000km using the specific AMG-approved synthetic lubricant.
Regularly inspect the tire tread patterns, as the staggered setup on the GLS63 can lead to uneven wear if alignment isn't monitored.
Verify that the MBUX software has been updated to the latest version by your local Mercedes-Benz service centre.
Keep an eye on the coolant levels and check for any signs of residue in the engine bay during your routine under-bonnet checks.
Maintain the air suspension health by ensuring the car is parked on level ground where possible to reduce strain on the air bags.
Estimated repair costs if issues arise
If the vehicle begins to sag overnight or the compressor struggles to maintain height, it is helpful to keep a buffer for these complex suspension units.
The GLS63 requires heavy-duty stopping power; when the time comes for a full set of pads and rotors, it is wise to budget for genuine parts to maintain safety and performance.
Depending on the car's history, you might eventually need to budget for the specialized 48V battery system should it report reduced capacity, which is a specialized item.
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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