2019 — 2026
2.0L Turbo (M139) - A45 S AMG Ultra High Performance
Petrol
Listen carefully for any 'clunking' or metallic clicking from the adaptive suspension dampers during low-speed maneuvers, as these complex units can show signs of wear after spirited use.
Check the DCT gearbox performance by coming to a complete stop and accelerating gently; it is worth noting if the transmission feels hesitant or jerky, as the M139 engine puts significant torque through the clutches.
Observe the digital cockpit display while parked; it is wise to ensure the infotainment screen responds snappily to touch inputs, as system glitches can occasionally arise in high-tech MB systems.
While driving, steer into a slight curve and check the wheel alignment; due to the aggressive factory geometry, these vehicles can be sensitive to uneven tyre wear patterns.
Usually marks the first major service interval where spark plugs and the engine air filter require attention for optimal M139 performance.
A common point to assess the state of the brake discs and pads, as the high-performance AMG setup is built for effectiveness rather than longevity.
The typical window where the dual-clutch transmission fluid and filter service is recommended to maintain crisp gear shifts.
Verify the service history confirms that the specific high-performance synthetic oil required for the M139 engine has been used at every interval.
Ensure the cooling system expansion tank is clear and there are no signs of residue, as the turbocharged engine runs at high operating temperatures.
Inspect the tyre condition; since this car uses specific performance-rated rubber, it is helpful to verify all four match to protect the 4MATIC+ all-wheel-drive system.
Check for any software update history, as Mercedes-Benz occasionally releases performance and stability improvements for the MBUX system.
Confirm that the brake fluid has been flushed recently, as it is a crucial step for maintaining the stopping power AMG is known for.
Estimated repair costs if issues arise
These performance rotors are designed for heavy track or spirited use. Depending on how the previous owner drove the car, you might eventually need to budget for a complete set replacement to maintain safety.
If one of the adaptive suspension struts requires attention in the future, it is a significant job. It's helpful to consider this when weighing up the long-term running costs of such a high-tech platform.
Maintaining the health of the 8-speed dual-clutch is vital. You should budget for this professional service at the prescribed intervals to ensure the gearbox continues to shift smoothly.
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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