Mercedes Benz F700

For some models, the numeric part of the designation does not match the motor displacement. This was done to show the model's position in the model lineup independent of displacement or in the price matrix. For these vehicles, the actual displacement in liters is suffixed to the model designation. For example, the 190-class all had "190" for the numeric designation, regardless of the motor size, to indicate their entry-level status. Also, some older models (such as the SS and SSK) did not have a number as part of the designation at all.
For the 1994 model year, Mercedes-Benz revised the naming system. Models were divided into "classes" denoted by an arrangement of up to three letters, followed by a three-digit (or two-digit for AMG models, with the number approximately equal to the displacement in liters multiplied by 10) number related to the engine size, as before. Variants of the same model (such as an estate version, or a vehicle with a diesel engine) are no longer given a separate letter. In most cases, the class designation is arbitrary. The SLR and SLS supercars do not carry a numerical designation.
As before, some models' numerical designations do not match the motor's actual displacement; in these cases the number shows the model's relative performance within the class. For example, the E250 CGI has greater performance than the E200 CGI because of different engine tuning, even though both have 1.8-litre motors. Recent AMG models use the "63" designation (in honor of the 1960s 6.3-litre M100 motor) despite being equipped with either a 6.2-litre (M156) or 5.5-litre (M157) motor.
Some models carry further designations indicating special features: