Mercedes-Benz

====Pre-1994====
Until 1994, Mercedes-Benz utilized an alphanumeric system for categorizing their vehicles, consisting of a number sequence approximately equal to the engine's displacement in liters multiplied by 100, followed by an arrangement of alphabetical suffixes, indicating body style and engine type.
* "C" indicates a coupe or cabriolet body style (for example, the CL and CLK models, though the C-Class is an exception, since it is also available as a sedan or station wagon).
* "D" indicates the vehicle is equipped with a diesel engine.
* "E" (for "Einspritzung") indicates the vehicle's engine is equipped with petrol [[fuel injection]]. Also used for electric models and plug-in hybrids.
* "G" was originally used for the [[Mercedes-Benz G-Class|Geländewagen]] off-road vehicle, but is now applied to Mercedes SUVs in general (G, GLA, GLC, GLE, GLK, and GLS).
* "K" was used in the 1930s, indicating a supercharger ("Kompressor") equipped engine. Three exceptions : the SLK, SSK and CLK, where K indicates "Kurz" (short-wheelbase) (though the SLK<ref>{{Cite web|url=https://www.roadandtrack.com/car-culture/a26543/mr-regular-mercedes-slk-230/|title=The Mercedes SLK230 Is the Rich Man's Miata|last=Regular|first=Mr|date=31 August 2015|website=Road & Track|language=en-US|access-date=16 January 2020|archive-date=10 July 2020|archive-url=https://web.archive.org/web/20200710232502/https://www.roadandtrack.com/car-culture/a26543/mr-regular-mercedes-slk-230/|url-status=live}}</ref> and SSK had a supercharger).
* "L" indicates "Leicht" (lightweight) for sporting models and "Lang" (long-wheelbase) for sedan models.
* "R" indicates "Rennen" (racing), used for racing cars (for example, the [[Mercedes-Benz 300SLR|300SLR]]).
* "S" Sonderklasse "Special class" for flagship models, including the S-Class, and SL-Class, SLR McLaren, and SLS sports cars.
* "T" indicates "Touring" and an estate (or station wagon) body style.

Some models in the 1950s also had lower-case letters (b, c, and d) to indicate specific trim levels. For other models, the numeric part of the designation does not match the engine displacement. This was done to show the model's position in the model range independent of displacement or in the price matrix. For these vehicles, the actual displacement in litres is suffixed to the model designation. An exception was the [[Mercedes-Benz W201|190-class]] with the numeric designation of "190" as to denote its entry-level in the model along with the displacement label on the right side of the boot (190E 2.3 for 2.3-litre 4-cylinder petrol motor, 190D 2.5 for 2.5-litre 5-cylinder diesel motor, and so forth). Some older models (such as the SS and SSK) did not have a number as part of the designation at all.