2020 — 2023
2.0L Turbo I4 (M264) - E300 Mild Hybrid
Petrol
Check the 48V system integration by watching the EQ Boost display during stop-start traffic. | Note: Ensure the transition between the combustion engine and the mild-hybrid motor is seamless, as jerky engagement might suggest calibration updates are needed.
Listen for any rhythmic clicking or fluttering from the engine bay while idling. | Note: It is worth keeping an ear out for any unusual noises from the M264 engine, as the high-pressure fuel pump and timing chain assembly should operate quietly in a well-maintained vehicle.
Operate the MBUX infotainment system for an extended period, toggling through maps, drive modes, and settings. | Note: While these systems are generally reliable, checking for software lag or freezing during your test drive helps ensure the digital cockpit is running smoothly.
Perform a low-speed maneuver over a series of bumps while listening closely for suspension noise. | Note: Given the sophistication of the E-Class suspension, any clunking or unusual feedback might indicate that it is time to check the control arm bushings or air suspension components if fitted.
Usually marks the first major service interval where transmission fluid flushing and spark plug replacement are typically scheduled.
Often considered the point where suspension bushings and engine mounts should be inspected for wear.
A common interval to check the integrity of the 48V battery health and auxiliary cooling systems.
Prioritize a full Mercedes-Benz service history to ensure the complex MBUX and hybrid software systems have been updated.
Ensure the transmission fluid service has been completed according to the manufacturer’s schedule to maintain gear shift quality.
Check the condition of the brake discs and pads, as the regenerative braking system can lead to different wear patterns than traditional setups.
Verify that the panoramic sunroof seals (if equipped) have been cleaned and lubricated to prevent sticking or noise.
Regularly monitor the coolant levels, as the M264 engine utilizes a complex thermal management system that benefits from healthy fluid levels.
Estimated repair costs if issues arise
If your model is equipped with air suspension, it is worth noting that rubber air bags can eventually show signs of fatigue in older vehicles. Budgeting for a potential strut replacement ensures you are prepared if the car struggles to maintain its level over time.
In high-performance four-cylinder units, the cooling system works hard. Future budget planning should include a possible water pump replacement, which is a common preventive maintenance task for European engines of this nature.
This is the heart of the mild-hybrid system. While these are engineered for longevity, it is wise to be aware that professional diagnostics or replacement costs for hybrid-specific components can be higher than standard alternators.
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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