2014 — 2015
2.0L M133 DE20 AL (265kW) - 4MATIC
Petrol
During low-speed maneuvers, listen for any 'clunking' sounds from the front end, as the control arm bushings and ball joints can occasionally show signs of wear in the X156 chassis.
Check the DCT transmission by performing a series of stop-start movements in 'Comfort' mode; look for hesitation or jerkiness, as these gearboxes prefer smooth, consistent inputs.
Observe the infotainment screen and reverse camera while the engine is running; ensure there is no flickering or signal loss, as the wiring looms in the tailgate area can sometimes face fatigue.
Before your drive, check the front brake rotors for a significant 'lip' or ridge at the outer edge, as the AMG performance brakes are high-wear components that can become quite expensive to replace.
Usually the window where secondary cooling system components, like the auxiliary water pump, might benefit from a preventative health check.
Time to inspect the DCT fluid and filter, as this is crucial for maintaining the crispness of the dual-clutch shifts.
A major milestone where you should confirm the integrity of the engine mounts, as the torque from the M133 engine can accelerate their natural aging.
Always use the manufacturer-recommended high-performance engine oil to keep that hand-built M133 engine running smoothly.
Keep a close eye on your coolant levels; the turbo-charged systems in these AMGs run quite warm and prefer to be topped up with the correct coolant mix.
Regularly clean the drain holes near the panoramic sunroof if fitted, as this prevents water ingress into the cabin electronics.
Ensure the brake fluid is flushed every two years, as the AMG braking system relies on precise hydraulic pressure for its performance.
Listen to your tires; these cars can be sensitive to alignment, so a quick check during every second service can save you from uneven wear.
Estimated repair costs if issues arise
These are high-performance parts that provide excellent stopping power but do wear faster than standard Mercedes components. Depending on how the car has been driven, you might eventually need to budget for a full set of pads and rotors.
This is a specialized piece of engineering. If the transmission begins to feel hesitant during your ownership, a professional service is the best way to extend its longevity.
The M133 engine is a high-output unit that puts significant heat through the cooling system. In cars of this age, it's common to consider preventative maintenance on these components to avoid overheating issues.
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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