"Is the E Serisi E450 reliable, and what should you check?"
When buying a used Mercedes-Benz E-Class E450 2018 (213 / 238), the most frequently mentioned issue is carbon buildup on intake valves. Also, oil consumption and leaks are commonly reported.
Engine: M276
M276.823 · turbo petrol · E450 · Used in this car from 2018-2019
Known engine issues
Timing chain tensioners are the most problematicThe most problematic part of this engine is the timing chain tensioners. If their failure is missed, the entire timing set with camshaft adjusters will need replacement.
Camshaft pulse discs may shiftOn these engines, the pulse discs on the camshafts often shift out of position.
Direct injection injectors are fuel-quality sensitiveThe direct injection injectors are sensitive to fuel quality.
+1 more issues on the engine detail page
Known issues and risks
Listed from most frequently reported, each with its source.
Carbon buildup on intake valves
Often reported
Direct injection engines, especially with city and short-distance driving, can develop carbon deposits on intake valves over time, leading to rough running, unstable idle, humming, and possible misfires.
Engine Internal
Oil consumption and leaks
Often reported
M256 engines (3.0 variant used in E 450) have reported oil consumption and/or leaks: frequent oil top-ups, leaks from gaskets or valve seals, and abnormal consumption as mileage increases.
Engine Internal
Chain/timing noise on cold start
Often reported
M256 six-cylinder engines (used in E 450) have reported humming or rattling noises when cold, related to timing chain slack/tensioner issues. Typical symptom is a rattle in the first seconds after start; if untreated, it can lead to wear.
Timing chain
Mercedes-Benz E Serisi E450 technical specs
Mercedes-Benz E Serisi E450 (2018): boot 540 L; fuel use 8,6 l/100 km (urban 12,2 l/100 km · extra-urban 6,5 l/100 km); 0–100 in 5.6 s.
Boot capacity
540 L
Fuel consumption
8,6 l/100 km (urban 12,2 l/100 km · extra-urban 6,5 l/100 km)
What to look for when buying a Mercedes-Benz E-Class E450?+
When buying a 2018 E450, check service history, test drive, and look for engine/transmission warnings. Most commonly reported issues: carbon buildup on intake valves; oil consumption and leaks; chain/timing noise on cold start.
What are the chronic problems of the Mercedes-Benz E-Class E450?+
Most commonly reported issues: carbon buildup on intake valves; oil consumption and leaks; chain/timing noise on cold start.
Is the Mercedes-Benz E-Class E450 reliable?+
Rather than a simple yes or no, it's better to weigh the proven pros and cons together. This page lists 3 verified findings.
How does Carbeak collect data?+
The cards on this page are derived from the Difetti fault database; compatibility of brand, fuel, engine, and generation between source and target vehicle is verified. Topics with insufficient evidence are not shown.
We only publish claims we can verify. Cards come from Difetti fault records matched to this vehicle on brand, fuel, engine and generation.
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