Heckflosse

Heckflosse (pronounced hek-flos or hek-floss-ah (German))

A nickname for the Mercedes-Benz W111 & W112 sedans produced between 1959 and 1968 (1961-1971 for the coupés and cabriolets with the abbreviated fin) and usually translated in English as “fintail”.

1959: A compound word in modern German, Heck (rear; back) + Flosse (fin).  As a surname, Heck (most common in southern Germany and the Rhineland) came from the Middle High German hecke or hegge (hedge), the origin probably as a topographic name for someone who lived near a hedge.  The link with hedges as a means of dividing properties led in the Middle Low German to heck meaning “wooden fencing” under the influence of the Old Saxon hekki, from the Proto-West Germanic hakkju.  In nautical slang heck came to refer to the “back of a ship” because the position of the helmsman in the stern was enclosed by such a fence and from here it evolved in modern German generally to refer to "back or rear".  Flosse is obscure but was probably related to the Middle English and Old English finn, the Dutch vin, the Low German finne and the Swedish fena.  Because all German nouns are capitalized, Heckflosse is correct but in English, where it's treated as a nickname, heckflosse is common. 

The (low) rise and (rapid) fall of the Mercedes-Benz tail-fin

Although designed during Detroit’s tail-fin craze during the mid-late 1950s, Mercedes-Benz always claimed the Heckflosse (tail-fins), introduced in 1959, weren’t mere stylistic flourishes but rather peilstege (parking aids or sight-lines (literally "bearing bars", the construct being peil-, from peilen (take a bearing; find the direction) + Steg (bar))) which marked the extent of the bodywork, this to assist while reversing.  It's never been clear if this interpretation existed during the design process or was applied retrospectively in response to criticism after the debut but by 1960, even in the US where fins has assumed absurd proportions, the fad was fast fading.  As a cultural artifact, the distinctiveness of the Heckflosse made them a staple for film-makers crafting the verisimilitude of the 1960s high cold war, just as the big 600s from the same era are used still when wealth or evil needs to be conveyed.

1963 Mercedes-Benz 300 SE Lang (Long) (W112).

Although on a longer wheelbase than the standard 300 SE, the model designation remained the same, the SEL nomenclature not appearing until the subsequent (W109) 300 SEL (1965), the additional chrome framing around the badge on some early-build models the only embellishment.  The alpha-numeric soup of model designations which proliferated from the late 1960s started as something almost logical (ie a 300 used a 3.0 litre engine, a 220 a 2.2 etc) but as new product lines emerged, anomalies increased until, in the early 1990s, it was re-organized although the new system would generate its own inconsistencies and eventually the number often had only a vague relationship with engine displacement.

On 1 October 1966, Heckflosses were part of the small motorcade in which, having served the twenty year sentences they were lucky to receive from the International Military Tribunal (IMT) at Nuremberg (1945-1946), war criminals Albert Speer (1905-1981) and Baldur von Schirach (1907–1974) were driven from Spandau prison in Berlin.  The next day he boarded a Pan-Am Boeing 727 for a flight to Hannover, his first time on a jet aircraft because in 1945 permission had been denied (ostensibly on security grounds) for him to go on a test flight in one of the two-seater Messerschmitt Me-262s built for training.  Like many aspects of his life after release, the THF-HAJ flight had been planned while in Spandau, Speer particularly taken with the 727 because he'd so often seen it during its final descent while tending the prison grounds which he transformed into a landscaped park.

1971 Mercedes-Benz 280SE 3.5 Coupé (W111).

On the sedans, the uncharacteristic exuberances were left undisturbed until production ended in 1968 although the line was restricted to a line of lower cost utilitarian models after 1965.  The coupé and cabriolet were introduced in 1961 and lasted a decade.  Truncating the Heckflosse, they achieved an elegance of line Mercedes-Benz has never since matched but then, few others have.

1969 Mercedes-Benz 300SEL 6.3 (W109).

By 1965, on the W108 and W109 which replaced the more expensive W111 & all the W112 sedans, the fins were barely discernible, the factory noting the contribution to structural rigidity, adding strength without the increase in weight the use of other techniques would have imposed.

1978 Mercedes-Benz 450SLC 5.0 (C107).

Advances in metallurgy and engineering meant achieving the required strength became possible even without additional curvature in the metal and in 1971 the R107 (roadster) and C107 (coupé) debuted with the rear surface an uninterrupted flat plane.

1978 Mercedes-Benz 450SEL 6.9 (W116).

Despite that, a year later, the W116 sedans were released with the most vestigial of fins.  The retention of styling elements between generations is not unusual, the second generation Range Rover reprising the earlier model’s distinctive hood creases, even though no longer a structural necessity.