M274 2.0 turbo
The facelift E200/E250 petrol. A modern 2.0 turbo four that replaced the older M271 EVO. Refined and reasonably trouble-free; like any direct-injection engine it will accumulate intake carbon over time.
| Configuration | I4, turbocharged | Displacement | 1991 cc |
| Fuel | petrol | Injection | direct |
| Shared components | direct injection | ||
Cars using this engine
Engine and component issues
Oil around the connectors on the front of the engine, a camshaft timing fault code, and in later stages erratic running or electrical faults as oil travels along the harness. The camshaft adjuster solenoids, which Mercedes calls magnets, let oil seep past their seals and along the inside of their connectors. Left alone, the oil wicks through the wiring loom and can reach the engine control unit.
Check: Unplug or inspect the connectors on the camshaft magnets at the front of the engine and look for oil inside them. Ask whether the magnets have been replaced, because catching it early is cheap.
Rough cold idle, slow throttle response, misfires, gradual loss of low-end response. Direct injection puts no fuel over the intake valves, so crankcase vapour deposits bake on undisturbed.
Check: Not visible without a borescope. Treat it as a service item that's due unless there's a receipt. It's not a fault, it's an unbudgeted maintenance cost.
Chassis, gearbox and body issues aren't listed here. They depend on which car the engine is fitted to. Open a variant page for the merged list.