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 (gradual) fall of the Mercedes-Benz tail-fin
Lindsay Lohan examining the damage to a 2009 (fifth generation) Maserati
Quattroporte leased by her father, the impact suffered in a minor traffic accident while her assistant was at the wheel, Los Angeles, 2009. Lindsay Lohan understands the functionality of Peilstege.
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 artefact, 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 framing around the badge appeared only on some early-build models and was a unique embellishment although the 300 SE, by German standards "dripped with chrome". The chrome trim attached to the tail-fins on the 300 SE and the most expensive of the W111 range (220 S & 220 SE) wasn't fitted to the 220 or the cheaper W110 models and in a quirk of production-line economics, it transpired it was more expensive (ie labor intensive) not to fit the trim because of the additional finishing required. 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.
Heckflosse
assembly line, Stuttgart, Germany, 1962.
The Heckflosse was one of the first
cars to include in its design the concept of the “safety cell”, a passenger
compartment designed to protect the occupants in the case of impacts or
roll-overs, the structures to the front and rear (ie the engine bay and luggage
compartment) essentially “sacrificial”.
This idea was the ancestor of the modern “crumple zone” in which the
front and rear compartments were designed to deform upon impact rather than
retaining structural integrity, the object being to absorb and dissipate the
energy generated in a crash, preventing it reaching the passengers. The concept was not new, having for
generations been a part of naval architecture, warships using what designers
dubbed the “armored citadel”: a kind of “box” containing the vital machinery
and magazine (ammunition), the structure created by the armoured deck, waterline
belt, and the transverse bulkheads.
While this design didn’t make warships “unsinkable”, it did make them
harder to sink and there have been ships which have had their whole bow &
stern blown off yet have remained afloat, able to be towed back to port.

1961
GAZ-13 Chaika (Seagull) (1959-1981, from the Soviet Union, left), Sunbeam
Alpine (1959-1968, from the United Kingdom, centre) and 1961 Chrysler Imperial
Crown Windsor (from the US, right). There's long been much comment about the Heckflosse's fins (only the factory called them Peilstege) being a unexpected concession to a styling fad but they do need to be compared with what was happening not only on both sides of the Atlantic but in Moscow too.
1957 Ford Thunderbird. Fin-wise, the closest comparison to the Heckflosse was probably the 1957 Ford Thunderbird which, compared with what Chrysler and General Motors (GM) were doing at the time, was quite restrained. Genuinely, the fins on the Thunderbird were functional as Peilstege.

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 the first Nuremberg Trial (1945-1946), war criminals
Albert Speer (1905–1981; Nazi court architect 1934-1942; Nazi minister of armaments and war production 1942-1945) and Baldur von Schirach (1907-1974; head of the Hitlerjugend (Hitler Youth) 1931-1940 & Gauleiter (district party leader) and Reichsstatthalter (Governor) of Vienna 1940-1945) 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'd transformed into a landscaped park.

1971 Mercedes-Benz 280 SE 3.5 Coupé (W111, 1961-1971).
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 have.

1969 Mercedes-Benz 300 SEL 6.3 (W109, 1965-1972).
By
1965, on the W108 and W109 (which replaced the more expensive W111 models & 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 450 SLC 5.0 (C107, 1971-1981).
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 450 SEL 6.9 (W116, 1972-1980).
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.
The Heckflosse as rally and race car
Mercedes-Benz 220 SE, Monte Carlo Rally, 1960.
To those
accustomed to how things are done in the modern WRC (World Rally Championship)
or have memories of the marvellous Group B cars of the 1980s (a category which
enthralled everybody except the clipboard crew at the FIA (Fédération
Internationale de l'Automobile (the International Automobile Federation)) which,
being international sport’s dopiest regulatory body, of course outlawed the
things) it will seem improbable the Heckflosse would have been a successful
rally car but the record was illustrious.
It’s best remembered for the 220 SE which won the 1960 Monte Carlo Rally
but there were many other successes including the 1961 Algiers-Cape Town Central
Africa Rally, an arduous event of some 13,500 kilometres (8400 miles) conducted
over several weeks on a route from Cape Town to Algiers (a 190 D (a diesel-engined
W121 “pontoon” rather than a Heckflosse) had won in 1959 which proved it was a
rally which didn’t rely solely on speed).
First run in 1951 and based on an event staged in 1930, in 1956 a Fiat
1100 and a Ford Ranch Wagon V8 (two vehicles most unalike) had tied for first
place, the latter driven by Elon Musk's (b 1971) maternal grandfather, chiropractor
Joshua Norman Haldeman (1902–1974), who was an interesting character.

Mercedes-Benz factory rally team (part of the competition department, scaled down since the withdrawal from top-flight Formula One and sports car racing after 1999), Acropolis Rally, 1963.
The most prestigious
African rally was the East African Safari and a Heckflosse 220 SE won in 1961,
following victories by 219s the previous two years. The 219 (W105, 1956-1959)
was a curious anomaly among the post-war Mercedes-Benz saloons in terms of both
nomenclature and engineering. Using a “mix
& match” approach which had been part of the transportation business even
before things became motorized, the 219 used the 2.2 litre six-cylinder engine
familiar in the various 220s (W128 & W180) but mounted it on the shorter “pontoon”
platform used by the 4-cylinder 180 & 190 (W120 & W121) variants, the
sacrificed length all accounted for by the shorter rear-doors (and thus
wheelbase). It was one of the more
elaborate “de-frilling” exercises seen around the world, the variations
including a lower cost version of an existing model (Citroën ID vs DS or
Chevrolet’s Biscayne vs the Bel Air & Impala) or an existing body with a
smaller engine substituted (Humber Hawk vs Super Snipe). The 219’s designation was unusual in that it
was the only occasion the familiar three numerals featured something other than
a “0” as the last digit and it’s notable also because the factory, in a blatant
attempt to evade the taxes levied on cars with 2.2 litre engines, slightly
reduced the displacement. The FRG’s
(Federal Republic of Germany, the old West Germany) government must have
decided this was “un-German” trickery (dieselgate was decades away) because eventually
they informed Daimler-Benz the 219 would be taxed as a 2.2 litre vehicle, This brought production to an end because the
effect of the tax increase would have negated the advantage the 219 had
enjoyed.

The winning Mercedes-Benz 300 SE, Spa-Francorchamps 24 Hour, 1964. Note the absence of the chrome trim which usually adorned the W112, the same weight-saving measure applied to the rally machines.
The 220 SE
enjoyed a remarkable record in the Poland Rally winning four successive titles
between 1960-1964 and the car also won the 1962 Liège-Sofia-Liège, the factory winning
the same event in 1963 with the new 230 SL (the W113 “Pagoda”, 1963-1971). The Heckflosse also won the Acropolis Rally
in two successive years, a 220 SE taking the chequered flag in 1962 and a 300
SE (W112) the following year. The 300 SE
was even less obviously a rally car than the 220 SE because it was a luxury
model which used the then novel engineering of air suspension which provided a
smooth ride but added to weight and complexity, neither quality sought by teams
using cars in competition although the system did have the advantage of
permitting ground clearance easily to be adjusted. To compensate for the added weight, the 300
SE used a variant of the 3.0 litre straight-6 from the 300 SL (W198; 1954-1963)
Gullwing and roadster, a powerful, robust unit.
However, by 1963 it was obvious the days of the big sedans being effective
rally cars was drawing to a close; the greater power of the 300 SE had
permitted the Heckflosse quite an Indian summer but the future clearly belonged
to lighter, more nimble machines such as the Alfa Romeo Giulia, Mini Cooper,
Saab 96 and Volvo 122. Remarkably, the
Heckflosse’s swansong came on the circuits and in 1961 a 220 SE won the second Armstrong 500 in Australia, the event which became the annual Bathurst 1000.
In the 1963 Argentine Touring Car Grand Prix, the 300 SE finished 1st,
2nd & 4th (a 220 SE was 3rd); it followed
this the following year with one of the factory’s “trademark” one-two-three finishes
and that same year the 300 SE won the Spa-Francorchamps 24 Hour, the Nürburgring
6 Hours and the Macau Grand Prix.