Mercedes-Benz M270/M274 engine

The M270 and M274 are turbocharged inline-four engines produced by Mercedes-Benz since 2011. They are the successor to the previous M266 and M271 engines respectively. The engine appeared on the Ward's 10 Best Engines list for 2017.

Design
M270 refers to the transverse configuration for front-wheel drive vehicles, while M274 refers to the longitudinally-mounted layout for rear-wheel drive vehicles. Both engines are based on the same design with dual overhead camshafts, 4 valves per cylinder, variable valve timing, direct injection, and compliance with the EU6 emissions standard. A 1991 cc engine was introduced in September 2012 featuring an increased piston stroke up to 92 mm, increased performance figures, and a 9.8:1 compression ratio. The M274 engine was also used on the Infiniti Q50 since 2014.

M270 DE16 LA R
75 kW version
 * 2015–2018 A 160 (W176)
 * 2015–2018 B 160 (W246)

90 kW version
 * 2011–2018 B 180 (W246)
 * 2012–2018 A 180 (W176)
 * 2013–2019 CLA 180 (C117)
 * 2015–2019 GLA 180 (X156)

M270 DE16 LA

 * 2011–2018 B 200 (W246)
 * 2012–2018 A 200 (W176)
 * 2013–2019 CLA 200 (C117)
 * 2014–2019 GLA 200 (X156)

M270 DE20 LA
115 kW version
 * 2013–2018 B 200 Natural Gas Drive (W246)

135 kW version
 * 2013–2018 B 220 4MATIC (W246)
 * 2014–2018 A 220 4MATIC (W176)
 * 2016–2018 CLA 220 4MATIC (C117)

155 kW version
 * 2012–2018 A 250 (W176)
 * 2012–2018 B 250 (W246)
 * 2013–2019 CLA 250 (C117)
 * 2013–2019 GLA 250 (X156)
 * 2015–2019 Infiniti Q30
 * 2016–2019 Infiniti QX30

160 kW version
 * 2015–2018 A 250 Sport (W176)
 * 2015–2019 CLA 250 Sport (C117)

M274 DE16 LA
95 kW version
 * 2015–2019 C 160 (W205)

115 kW version
 * 2012–2013 C 180 (W204)
 * 2014–2019 C 180 (W205)
 * 2013–2016 E 180 (W212)
 * 2015–2020 SLC 180 (R172)

M274 DE20 LA
115 kW version
 * 2013–2016 E 200 Natural Gas Drive (W212)

135 kW version 155 kW version
 * 2013–2016 E 200 (W212)
 * 2013–2016 GLK 200 (X204)
 * 2014–2018 C 200 (W205)
 * 2015–2020 SLC 200 (R172)
 * 2016-2023 E 200 (W213)
 * 2013–2016 E 250 (W212)
 * 2013–2016 GLK 250 (X204)
 * 2016–2019 GLC 250 4MATIC (X253)
 * 2014–2018 C 250 (W205)
 * 2015–2018 C 350e (W205)
 * 2018–2021 C 300e (W205)
 * 2015–2019 V37 Q50/Nissan Skyline (2014-2019; 200GT-t DBA-ZV37/DBA-YV37)
 * 2016–2018 E 250 (W213)
 * 2016–2018 E 350e (W213)
 * 2018–2023 E 300e (W213)
 * 2015–2019 GLC 350e 4MATIC (X253)
 * 2019–2022 GLC 300e 4MATIC (X253)
 * 2016–present V 250 (W447) (Chinese market)
 * 2016-2023 Metris (W447)
 * 2016–present CV37 Q60
 * 2015–2019 Y51 Q70

180 kW version
 * 2015–2018 C 300 (W205)
 * 2015–2018 E 300 (W213)
 * 2015–2019 SLC 300 (R172)
 * 2015–2019 GLC 300 / GLC 300 4MATIC (X253)