2017 — 2023
4.0L M177 Biturbo V8 - All-wheel drive performance model
Petrol
While at a standstill and at operating temperature, perform a slow U-turn at full steering lock. | Observation: Listen for any 'binding' or 'scrubbing' sensations from the front axle, which can sometimes occur in high-performance 4MATIC systems as the limited-slip differential ages.
While accelerating moderately in Comfort mode, pay close attention to the gear changes between 2nd and 3rd gear. | Observation: The MCT multi-clutch transmission is complex; ensure shifts are smooth rather than clunky, as these units benefit from regular software updates and fluid services.
Check this by inspecting the front cooling intakes and radiator surfaces for debris or damage. | Observation: The M177 engine has multiple heat exchangers. Any visible damage or bent fins may lead to cooling inefficiencies that are worth investigating before purchase.
While driving on a varied road surface, switch through the drive modes and adjust the suspension settings. | Observation: The air suspension is sophisticated; ensure the vehicle maintains a level ride height and there are no persistent warning lights regarding the chassis system.
Likely time for the first major spark plug replacement and a comprehensive transmission fluid service.
Consider a full inspection of the engine mounts, as the high torque output can lead to increased wear over time.
A common point to assess the condition of the air suspension bellows and compressor health.
Verify the service history confirms the use of Mercedes-approved high-performance synthetic oil at the correct intervals.
Check for documented evidence of brake pad and rotor measurements, as the high-performance AMG braking systems are significant consumables.
Ensure the panoramic sunroof mechanism has been lubricated during recent services to keep the seals happy.
Confirm that the 4MATIC+ system has had its transfer case fluid serviced in accordance with the specific AMG maintenance schedule.
Inspect the tires for even wear, which confirms that the complex AMG wheel alignment settings are currently in spec.
Estimated repair costs if issues arise
If the vehicle is equipped with the optional carbon-ceramic brakes, the replacement costs are substantial. Even for the standard steel performance brakes, expect to plan for high-quality pads and rotors as they reach the end of their life.
Depending on the car's history and exposure to harsh elements, you might eventually need to budget for the replacement of air struts or the compressor unit to maintain the ride quality.
If you notice increased cabin vibration at idle, it is common to consider replacing the dynamic engine mounts. These are specialized components designed to balance comfort and handling.
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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