Start the engine and disappointingly the classic hint
of diesel noise is still there compared to the whisper quiet S 400 d.
It's a bit growly around town and even at motorway speeds there's quite an audible
gravelly diesel noise, but it's only a small niggle.
Even though the engine compartment is well sealed, the typical
diesel noise breaks through the cockpit, and under load, there are volume carmakers which have engines with a more pleasant sound.
The optional Cummins Turbo Diesel offers torque enough to pull a house off its foundation and better on - road economy, at the cost
of diesel noise and roughness.