2020 — 2022
2.0L Turbo I4 (M260)
Petrol
Cold start the car and listen closely for a rough idle, hunting revs, or a Check Engine Light (CEL). During the drive, perform several hard acceleration runs to check for power delivery flat spots or hesitation. | Advice:
Drive at low speeds in stop-and-go traffic, manually shifting between 1st, 2nd, and 3rd gears. Listen for metallic clunks and feel for sudden jerking or hesitation during gear engagement. | Advice:
Perform tight U-turns on a flat, quiet surface at low speed with full steering lock, listening for grinding, binding, or skipping sensations from the rear of the car. | Advice:
Cycle through all menus on the dual 10.25-inch MBUX screens, test the voice control system, and toggle the reversing and 360-degree cameras repeatedly to check for system lag or black screens. | Advice:
Minor Service 'A' due. Includes engine oil and filter change, cabin dust filter replacement, and a full diagnostic scan to check for any stored transmission or engine fault codes.
Major Service 'B' due. This is a critical milestone requiring the replacement of the AMG DCT transmission fluid and filter, the 4MATIC rear differential fluid, spark plugs, and the engine air filter.
Comprehensive vehicle health check. Expect to replace the auxiliary 12V backup battery, perform a complete engine coolant flush, inspect the drive belts, and closely check the adaptive dampers for fluid leaks.
Strictly use Mercedes-Benz approved MB 229.51 or 229.52 high-performance synthetic oil to protect the turbocharger and valvetrain.
Ensure the dual-clutch transmission (DCT) fluid and filter are replaced every 60,000 km to prevent Mechatronic unit failure.
Monitor the engine coolant level regularly; any sudden drops could indicate a water pump leak or the known cylinder head valve issue.
Replace spark plugs every 3 years or 50,000 km to prevent ignition coil stress and engine misfires under high boost.
Ensure the vehicle is running the latest MBUX software firmware to mitigate battery drain and system glitching issues.
Estimated repair costs if issues arise
The most notorious issue on early M260 engines. If the car experiences compression loss and is out of the Mercedes goodwill/warranty window, a top-end rebuild is required.
The high-performance AMG braking system wears rapidly, especially under spirited driving. Rotors are highly susceptible to lipping and must be replaced in pairs with new pads.
A complex, specialized service requiring specific diagnostic equipment to monitor fluid temperature during fill. Vital for preventing catastrophic gearbox wear.
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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