GL550 tagged posts

If you have been following our articles, you may have already seen the newest V8 engine from Mercedes-Benz: the M177/178 with 4.0L displacement and twin-turbochargers, which currently is only available on the AMG models (the AMG GT and also the W205 C63 AMG). However, Mercedes-Benz has decided to gradually phase out the aging M278 4.7L turbo V8 with this new M177/178 V8, and the first non-AMG model that receives this treatment is the 2016 GLS500 (not sold in US).

According to Mercedes-Benz, the 2016 model year GLS500 (the previous GL500) will use a detuned version of the M177 engine, which output is rated at 421 ps and 443 lb-ft (600 Nm) of torque, mated to the 7-speed a...

Review Index:
The 2014 Mercedes-Benz GL450 – Part 1 (Exterior)
The 2014 Mercedes-Benz GL450 – Part 2 (Interior)
The 2014 Mercedes-Benz GL450 – Part 3 (Chassis and Suspension)
The 2014 Mercedes-Benz GL450 – Part 4 (Powertrain)

The GL450 is equipped with Mercedes-Benz’s M278 engine.

The M278 is Mercedes-Benz’s latest direct injected, twin-turbocharged V8 engine, with 4.7L displacement. Basically speaking, M278 is the turbo version of the M273 V8, plus fuel direct injection. This same engine can be seen on many Mercedes-Benz vehicles such as the S-class, CL-class, CLS-class, E-class, M-class etc, but with different tunes to generate different level of outputs...