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Mercedes Benz E 450 Problems

The Mercedes-Benz E 450 is the six-cylinder variant of the E-Class, powered by a 3.0L inline-six turbocharged engine with EQ Boost mild hybrid technology producing 362 horsepower. Available since 2019 as Mercedes transitioned from V6 to inline-six engines, the E 450 delivers smooth power and refined performance. With 164 complaints and zero deaths on record, the E 450 represents the balanced choice between the base E 300 and AMG performance variants.

164
Total Complaints
46
Total Recalls
6
Model Years
0
Reported Deaths
✓

Best Years

These years have the fewest reported problems.

2024

Common Problem Categories

Electrical System 28
Engine 24
Tires 16
Power Train 16
Back Over Prevention 14

Complaints by Model Year

All Model Years

Year ↓ Complaints Recalls Crashes Fires Rating
2024 6 4 0 0 Good
2023 44 4 0 0 Below Average
2022 30 5 0 0 Average
2021 16 14 0 0 Average
2020 16 7 0 2 Average
2019 52 12 0 0 Below Average

Mercedes Benz E 450 Years to Avoid

The 2019 E 450 as the first year of the new inline-six engine recorded the most complaints, with issues including mild hybrid system software glitches, air suspension problems on equipped models, and occasional transmission hesitation. First-year production always carries some refinement needs.

Best Mercedes Benz E 450 Years

The 2024 E 450 benefits from several years of inline-six production refinement and represents the most polished version. The engine and transmission calibration have been optimized, and electronics issues have been largely addressed through software updates.

Frequently Asked Questions

Is the E 450 inline-six reliable?

The M256 inline-six has proven generally reliable. The integrated starter-generator and 48-volt system add complexity but have functioned well. This engine replaced the previous M276 V6 and offers better efficiency.

How does the E 450 compare to the E 300?

The E 450 offers 107 more horsepower and significantly better acceleration. The inline-six is also smoother than the four-cylinder. The upgrade costs roughly ,000-8,000 but transforms the driving experience.

What is EQ Boost?

EQ Boost is Mercedes' 48-volt mild hybrid system that provides seamless start-stop, recuperative braking, and brief power assistance during acceleration. It improves efficiency without the complexity of a full hybrid.

Is the E 450 expensive to maintain?

The E 450 costs more to maintain than the E 300 due to the larger engine. Budget ,500-3,000 annually. The air suspension on 4MATIC+ models adds potential expense if struts require replacement.