Mercedes M274/M270 1.6/2.0L Engine Specs, Problems, Reliability. The Mercedes-Benz M274/270 is a series of 1.6 and 2.0-liter four-cylinder gasoline engines for front- and rear-wheel drive cars. The production of these engines began in 2011 at the Mercedes-Benz plant in Stuttgart Unterturkheim and later at MDC Power GmbH in Kolleda.
The M274 and M270 engines changed the outgoing M266 and M271 EVO engine households. While the M270 variation (M270.910 and M270.920) is utilized for front-wheel drive automobiles in the transverse engine layout (A-Class, B-Class, CLA-Class, GLA-Class, GLC-Class, and others), the M274 (M274.910 and M274.920) refers to the longitudinally-mounted installation in rear-wheel drive lorries such as C-Class and E-Class.
The M274/M270 has a diecast aluminum cylinder block (crankcase) with open deck style. The cylinder liners are made of cast iron. The cylinder bore size of 83 mm (3.27 in) was merged for both 2.0-liter and 1.6-liter versions. The distinction of 18.3 mm (0.72 in) in stroke sizes provides a 0.4 L gain in the overall displacement. The M274/M270 utilizes a hollow-cast crankshaft with 4 counterweights to lower its weight.
The 2.0 L version is geared up with a compact Lanchester module, which decreases engine NVH levels by causing second-order inertial forces. This module is screwed onto the crankshaft bearing block from listed below. At the bottom, there is a diecast aluminum oil pan, which provides an additional rigidness. An oil pump seats inside the oil pan. The M274/M270 uses a regulated oil pump driven by the crankshaft through a toothed chain. The oil pressure is controlled by the ME-SFI (ME) control join.
Mercedes M274/M270 1.6/2.0L Engine Specs, Problems, Reliability
On top of the engine block, there is a 16-valve cylinder head made of high-strength aluminum alloy. The consumption and exhaust valves are activated by two private, overhead mounted camshafts. Camshafts are chain driven by a toothed timing chain. The consumption and exhaust camshafts have solenoids of the camshaft modification system offering variable valve timing. Some engines consist of the Camtronic mechanism on the intake side.
This technology allows a switchover from a basic web cam for the upper load range to a small webcam in the partial load range. The consumption valve size is 31.5 mm; the exhaust valve diameter is 25.0 mm. the valve stem diameter is 6.0 mm.
The M274 and M270 engines include direct fuel injection. The high-pressure fuel pump lies on the top of the cylinder head and driven by the consumption camshaft. It produces up to 200 bar of fuel pressure for the fuel rail. The direct injection uses contemporary high-pressure piezo injectors, providing approximately 5 fuel injections into the combustion chamber during a cycle. Direct injectors are centrally located, while the spark plugs were transferred to the exhaust side and placed in between exhaust valves.
In order to enhance effectiveness and increase engine power and torque, the M274/M270 was geared up with a single-stage turbocharger (IHI AL0071 and IHI AL0070 – for 1.6 L and 2.0 L). The exhaust manifold and turbocharged kind one module (they are bonded together). The increase pressure is digitally managed (the max boost is 1.1 bar).
The consumption system likewise includes an air-to-air type intercooler, which cools hot compressed air. The M274/M270 engine likewise has a digitally controlled thermostat, shut-off mechanism for the coolant pump, single- and multi-spark ignition modes, alternator management system, Bosch MED 17.7.2 engine control system, and three-way catalytic converter. The engine series is compliant with the EU 6, EU 6d-TEMP emissions basic.
From 2017, Mercedes replaces the M274/M270 engines by the newest 1.5-liter and 2.0-liter followers – the M260/M264 engines.
Mercedes M274/M270 Engine Problems and Reliability
The M274/M270 engine family has a number of weak components occasionally. The very first one is the camshaft actuators (solenoids). Usually, after 60-70k miles, these engines start producing some sort of noise while they cold. This signifies wear inside camshaft adjusters. In 2014, engines got modified actuators (part no. A2700501147) that hold a bit longer.
The 2nd issue refers to the quick wear of the timing chain. Its life expectancy is around 80k miles (plus or minus 20k). The next issue with which you may come across on the precise the same mileage is turbocharger failure. The issue with the turbocharger is not extremely common, however it still has a place to be.
How dependable the M274/M270 will be over time depends on many aspects. As usual, Mercedes things require care and proper maintenance, probably more often than the maker needs on a schedule.
Mercedes M274/M270 1.6/2.0L Engine Specs
|Cylinder block material||Aluminum|
|Cylinder head material||Aluminum|
|Fuel system||Direct Injection|
|Number of cylinders||4|
|Valves per cylinder||4|
|Bore, mm||83.0 mm (3.27 in)|
|Stroke, mm||73.7 mm (2.90 in) – 1.6L
92.0 mm (3.62 in) – 2.0L
|Displacement, cc||1,595 cc (97.3 cu in)
1,991 cc (121.5 cu in)
|Type of internal combustion engine||Four-stroke, turbocharged|
|Compression Ratio||10.3:1 – 1.6L
9.8:1 – 2.0L
|Power, hp||101-154 hp (75-115 kW)/4,500-5,300 – M270 DE16 LA, M274 DE16 LA
154-241 hp (115-180 kW)/5,000-5,500 – M270 DE20 LA, M274 DE20 LA
|Torque, lb ft||133-184 lb-ft (180-250 Nm)/1,200-4,000 – M270 DE16 LA, M274 DE16 LA
199-273 lb-ft (270-370 Nm)/1,200-4,000 – M270 DE20 LA, M274 DE20 LA
|Engine oil weight||MB 229.5, SAE 0W-40|
|Engine oil capacity, liter||5.8l (6.1 qt) – 1.6L engine
6.5-7.0l (6.8-7.4 qt) – 2.0L engine
|Oil change interval, mile||9,000 (15,000 km) / 12 months|
|Applications||A-Class 160/180/200/220/250, B-Class 160/180/200/220/250, CLA 180/200/250, CLA250 Sport, GLA 180/200/250, GLC 250/300/350e, C-Class 160/180/200/250/300e, E-Class 180/200/250/300/350e, GLK 200/250, SLK 200/300, Infiniti QX30, Q50/Nissan Skyline, Q60, Q70|
Mercedes M274/M270 1.6/2.0L Engine Modifications
- M270 DE16 LA R (red.) This engine exists in 2 power output variations. Power system for the Mercedes W176 A160 and W246 B160 produces 101 hp (75 kW) at 4,500-6,000 rpm and 133 lb-ft (180 Nm) of torque at 1,200-3,500 rpm. The 2nd version has following specs and application: 121 hp (90 kW) at 5,000 rpm and 148 lb-ft (200 Nm) at 1,250-4,000 rpm, Mercedes W246 B180, W176 A180, C117 CLA180, and X156 GLA180.
- M270 DE16 LA – 154 hp (115 kW) at 5,000 rpm, 184 lb-ft (250 Nm) at 1,250-4,000 rpm. Apllication: Mercedes-Benz W246 B200, W176 A200, C117 CLA200, and X156 GLA200.
- M270 DE20 LA – 154-215 hp (115-160 kW) at 5,000-5,500 rpm, 199-258 lb-ft (270-350 Nm) at 1,250-4,000 rpm. This engine is utilized in the Mercedes-Benz W246 B200 Gas Drive, W176 A220 4MATIC, W246 B220 4MATIC, C117 CLA 250/ Sport, X156 GLA 250, W176 A250/ Sport, and W246 B250.
- M274 DE16 LA – 127/154 hp (95/115 kW) at 5,000-5,300 rpm, 155/184 lb-ft (210/250 Nm) at 1,200-4,000 rpm. While 95kW engine is used for the Mercedes W205 C160, the more effective 115 kW variant was used for the W204 C180 and W212 E180.
- M274 DE20 LA – a 2.0-liter engine with 115 kW, 135 kW, 155 kW, and 180 kW power varieties.
115 kW version: 154 hp (115 kW) at 5,000 rpm, 199 lb-ft (270 Nm) at 1,200-4,000 rpm – utilized in the W212 E200 Gas Drive design.
135 kW version: 181 hp (135 kW) at 5,500 rpm, 221 lb-ft (300 Nm) at 1,200-4,000 rpm – Mercedes W212 E200, X204 GLK200, W205 C200, R172 SLK200, and W213 E200.
155 kW version: 208 hp (155 kW) at 5,500 rpm, 258 lb-ft (350 Nm) at 1,200-4,000 rpm. Engine application: Mercedes W212 E250, X204 GLK250, W205 C250, W205 C350e, W213 E250, W213 E350e, X253 GLC350e, Infinity V37 Q50/Nissan Horizon, Infinity CV37 Q60 and Y51 Q70.
180 kW variation: 241 hp (180 kW) at 5,500 rpm, 273 lb-ft (370 Nm) at 1,300-4,000 rpm. The most effective engine in the M274 series was offered for the next vehicle models: W205 C300, W213 E300, X253 GLC300, R172 SLK300, and X253 GLC300/ GLC300 4 Matic.