The Mercedes Benz SK, in essence is basically a revamped Mercedes-Benz NG chassis with a few added driver comforts and electronic assistance and diagnosis.

There were few changes to the cab: radiator grill and wind leading plates were combined optically, and the lower edges of the side windows were made with a progressive decline towards the front.

As a result, the OM4XX series share many similar (not to be confused with identical) components which date as far back to the very early Mercedes Benz OM401 and 402 diesel engines.

One way this was achieved was by effectively 'de-tuning' the old motor by retarding the ignition timing by several degrees and thus reducing combustion temperatures and NOx emissions.

With the introduction of Euro 1 class emission control regulation, it is only understandable that the engines gained a mass disadvantage compared with the earlier models.

As the engines were now getting heavier due to Euro 1 class emissions fitting turbos, intercoolers, piping etc.

The semi automatic transmission was introduced as a means to make driving easier in that the driver required less thinking of rpm matching when approaching steep inclinations.