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The car that started it all: genuine Mercedes-Benz 300 SL Roadster with hardtop at the dealer lot of Depot3. Its chassis number 198042-10-002786 has been used on another vehicle.
The bomb was dropped on May 31, 2023: At nine o'clock in the morning, a large-scale raid by the Stuttgart Department of Public Prosecution commenced simultaneously at four locations to secure evidence. The targets: the Kienle Automobiltechnik GmbH company in Ditzingen near Stuttgart and the private homes of company owner Klaus Kienle and his sons Marc and Alexander. Since then, aficionados of the legendary Mercedes-Benz type W 198 – the 300 SL with gullwing doors and the roadster – are in turmoil. The question is simple: which example is an original and thus worth well over a million Dollars – and which one is a fake, ergo forfeiting any historical rights to even exist?

Behind the coordinated surprise visits by the 25 officers from the State Criminal Police Office of Germany's southwesternmost state Baden-Wuerttemberg is the suspicion that Kienle, without a doubt the most important restorer of high-value Mercedes-Benz classic cars worldwide, has been producing and selling professional duplicates of classic cars that had not been on the market for a long time. An example of this was a 300 SL Roadster with the rare fantasy yellow paint job that Kienle is presumed to have rebuilt completely.

Since breaking, the story has revealed numerous new findings. The second most important fact to come to light is that the car in question has been proven not to be a copy but is indeed a genuine factory-built 300 SL; thus supporting Kienle's steadfast assertions that the vehicle is not a replica. The most important new insight is that Kienle's resulting role in this case could actually considerably more unpleasant consequences for him. While this may sound highly contradictory, the facts of the story are in the details.

Bild Mercedes-Benz 300 SL Roadster, chassis number 198042-10-002786, at the 1961 Geneva Motor Show
Mercedes-Benz 300 SL Roadster, chassis number 198042-10-002786, at the 1961 Geneva Motor Show
Copyright / Fotograf: Archiv Hütten
Bild 300 SL Roadster number 198042-10-002786 in 1992 with its owner Heinrich Zollinger to the right
300 SL Roadster number 198042-10-002786 in 1992 with its owner Heinrich Zollinger to the right
Copyright / Fotograf: privat
Lost in second ownership

The object in question is chassis number 198042-10-002786, a 300 SL in fantasy yellow – the lone star of the Mercedes-Benz booth at the 1961 Geneva Motor Show. After the exhibition, the eccentric, legendary bon vivant Hans Ulrich Lenzlinger from Zurich, Switzerland, purchased the roadster. From 1969 to 2022 it belonged to farmer Heinrich Zollinger (1929-2023) in the Swiss canton of Schaffhausen, in between re-painted in red, and well under the radar of the 300-SL community. This is the reason the car was generally considered to have been lost – providing an opportunity for counterfeiters to use the chassis number to legitimatize a doublet with no identity whatsoever.

Bild Long-term 300-SL owner Heinrich Zollinger (left) and buyer Ralph Grieser
Long-term 300-SL owner Heinrich Zollinger (left) and buyer Ralph Grieser
Copyright / Fotograf: Depot3 GmbH
Bild Reunion in the spring of 2023: Ralph Grieser (left) visits previous owner Heinrich Zollinger with the freshly registered 300 SL Roadster
Reunion in the spring of 2023: Ralph Grieser (left) visits previous owner Heinrich Zollinger with the freshly registered 300 SL Roadster
Copyright / Fotograf: Depot3 GmbH
Bild Ralph Grieser (left), Heinrich Zollinger (middle) the latter's wife have a look at the impressive inline-six
Ralph Grieser (left), Heinrich Zollinger (middle) the latter's wife have a look at the impressive inline-six
Copyright / Fotograf: Depot3 GmbH
Bild Ralph Grieser, Mrs. Zollinger and Heinrich Zollinger next to the 300 SL
Ralph Grieser, Mrs. Zollinger and Heinrich Zollinger next to the 300 SL
Copyright / Fotograf: Depot3 GmbH
In the autumn of 2022, Ralph Grieser – owner of the classic car business Depot3 in Mülheim-Kärlich, in the German state Rhineland-Palatinate – bought Zollinger's 300 SL. When Grieser applied to register the car, he was shocked to learn the following: The Department of Transport informed him that another 300 SL with that chassis number ending …2786 already existed – another roadster in fantasy yellow that had been offered for sale by the Kienle company in 2019.

As Grieser was convinced of the authenticity of his number 2786 in view of the conclusive history as well as the almost untouched original condition (apart from the red paint job), he began to research the vehicle. At this point he also turned to the Parlamentskreis Automobiles Kulturgut (Parliamentary Group for Automotive Culture) of the German Bundestag, which has itself been investigating in illegal replicas of significant and highly valuable historic automobiles and the damaging effects of the trade for several years.

Bild Production order for the fantasy yellow Roadster displayed at the 1961 Geneva Motor Show
Production order for the fantasy yellow Roadster displayed at the 1961 Geneva Motor Show
Copyright / Fotograf: Daimler-Benz-Archiv
Bild Built sheet of the Mercedes-Benz 300 SL Roadster, chassis number 198042-10-002786
Built sheet of the Mercedes-Benz 300 SL Roadster, chassis number 198042-10-002786
Copyright / Fotograf: Daimler-Benz-Archiv
The head of the parliamentary group, Bundestag (Federal Parliament) delegate Carsten Müller, takes the view that counterfeit, highly-priced classic cars pose an existential threat to the social acceptance of classic vehicles in general. For this reason, after detailed deliberations, he decided to involve the German Bundeskriminalamt (Federal Criminal Police Office) in the investigation concerning the two roadsters with identical numbers. This office, in turn, informed the State Criminal Police Office of Baden-Wuerttemberg in March 2023, which passed the details on to the Stuttgart Department of Public Prosecution accordingly.

Finally, on May 31, 2023, the aforementioned raid commenced at Kienle's premises, with the operation apparently lasting several days. By June 6, officials had seized several Mercedes-Benz W 198 (300 SL) vehicles, "including two Gullwing coupés with identical chassis numbers, as well as one unnumbered chassis, one motor with a forged engine number and last but not least, a large quantity of business documents," as the German classic car magazine Oldtimer Markt reported in its July 2023 issue. The investigating authorities suspected that Kienle had been manufacturing and selling professional classic car replicas that had not been traded for a long time.

Bild 300 SL Roadster with the incorrect chassis number ...2786 shown on Kienle's Instagram page
300 SL Roadster with the incorrect chassis number ...2786 shown on Kienle's Instagram page
Copyright / Fotograf: Screenshot Instagram Kienle
As mentioned previously, 76 year-old Klaus Kienle has since strongly denied having copied the fantasy yellow car with the 2786 epithet. His company had only brokered the car in 2019 "on behalf of the previous owner on a commission basis" or "within the market portal of our business", as Kienle's own press release of June 1, 2023, clarifies, which also matches personal statements made by Kienle. Deviating from this line, he claims in another narrative version that the heirs of an old customer with terminal cancer had sold the car themselves via Kienle's company website, and that his business had nothing to do with the roadster beyond that sale. He was unaware of where the vehicle had then gone subsequently and since he had no obligation to check the chassis number, he could not know whether it was genuine or fake.

These statements by the world-renowned 300 SL expert do not sound particularly credible. Especially since he might well have been better acquainted with the car: In a 2019 issue of his own in-house magazine Kienle News, it was featured extensively and in detail – even gracing the cover of the 2020 Kienle wall calendar. A vehicle merely sold on behalf of a customer, enjoying the exposure in two major features in Kienle publications doesn't sound very convincing.

Bild Cover of the in-house magazine "Kienle News", issue 2/2019, ...
Cover of the in-house magazine "Kienle News", issue 2/2019, ...
Copyright / Fotograf: Depot3 GmbH
Bild ... which contains the article about the fantasy yellow 300 SL Roadster ...
... which contains the article about the fantasy yellow 300 SL Roadster ...
Copyright / Fotograf: Depot3 GmbH
Bild ... its chassis number has been forged.
... its chassis number has been forged.
Copyright / Fotograf: Depot3 GmbH
Stolen and repainted

Thanks to in-depth research over the following months, the mystery surrounding the bright yellow dream car has now been cleared up. It is now evident that the car is by no means a replica – as mentioned at the beginning, Kienle did not actually forge this 300 SL. Nevertheless, it is genuine but at the same time illegal: As is now known, the car, which, by the way, was painted white with a red leather interior when it left the factory, was reported stolen in Frankfurt/Main in May 1983. Its original chassis number did not end with 2786, but with 2765.

Bild Built sheet of the Mercedes-Benz 300 SL Roadster, chassis number ...2765, that has been stolen in Frankfurt/Main in 1983
Built sheet of the Mercedes-Benz 300 SL Roadster, chassis number ...2765, that has been stolen in Frankfurt/Main in 1983
Copyright / Fotograf: Daimler-Benz-Archiv
In 1992, the car reappeared for the first time, painted in fantasy yellow and bearing the identity of the 300 SL from the Geneva Salon, final number 2786. Owner: Martin Tobian, Germany. This is shown in a register entry of the "Gull Wing Group International", the world's largest 300 SL club based in the USA. Remarkably, not only the engine number 2807 corresponds to that of the original, which at the time was in a barn in Switzerland. The differential, the transmission as well as the steering and the front axle identification numbers, as "reported by Tobian", in the register also matched the original. The source on which these details are based should be clear: According to experts, only the official factory data card can be considered valid.

Ralph Grieser, the buyer of the genuine Swiss car, is now aware that the former white and now bright yellow 300 SL does not in fact have these numbers. Thanks to in-depth research, he has succeeded in identifying the roadster, which was stolen 40 years ago and subsequently renumbered, and which (according to Tobian) belonged to several well-known German collectors in between: It is currently in the collection of a Sultan in Malaysia. After some negotiations, Grieser even succeeded in obtaining an audience there, accompanied by Frank Steinacker, a classic car consultant and expert who had previously established the undoubted originality of Grieser's red roadster.

Bild The incorrect 300 SL Roadster with the forged chassis number ...2786 during its examination in Malaysia in 2023
The incorrect 300 SL Roadster with the forged chassis number ...2786 during its examination in Malaysia in 2023
Copyright / Fotograf: Steinacker Ingenieur-GmbH
Bild The incorrect 300 SL Roadster with the forged chassis number ...2786 during its examination in Malaysia in 2023
The incorrect 300 SL Roadster with the forged chassis number ...2786 during its examination in Malaysia in 2023
Copyright / Fotograf: Steinacker Ingenieur-GmbH
Bild The correct 300 SL Roadster with the real chassis number ...2786 on Depot3's lot in Mülheim-Kärlich
The correct 300 SL Roadster with the real chassis number ...2786 on Depot3's lot in Mülheim-Kärlich
Copyright / Fotograf: Depot3 GmbH
Steinacker's expert opinion, which he drew up on the basis of his investigations in Southeast Asia, can hardly be surpassed in terms of clarity. According to the report, the last digits of the chassis number were changed using steel punch numbers with a different typeface, and also the engine number had been clearly manipulated, in both cases, in such a bumbling manner that even amateurs are able to identify the manipulation. Some of the other numbers listed in the US Club Register have been removed, but obviously not consistently enough: The original coachwork number 275 can still be identified on the glove box lid. It confirms beyond doubt that the fantasy yellow 300 SL in Malaysia is indeed the former white painted vehicle that was stolen in Frankfurt in 1983.

Bild Obviously tampered with: chassis number ...2786 instead of the former ...2765. The re-stamping has deformed the sheet metal
Obviously tampered with: chassis number ...2786 instead of the former ...2765. The re-stamping has deformed the sheet metal
Copyright / Fotograf: Steinacker Ingenieur-GmbH
Bild The fantasy yellow 300 SL Roadster's chassis tag – faked as well
The fantasy yellow 300 SL Roadster's chassis tag – faked as well
Copyright / Fotograf: Steinacker Ingenieur-GmbH
Bild The yellow roadster's forged engine number consists of two different typefonts – and is wrong even for the fake.
The yellow roadster's forged engine number consists of two different typefonts – and is wrong even for the fake.
Copyright / Fotograf: Steinacker Ingenieur-GmbH
Even more remarkable is how the Sultan acquired the car with the fake chassis number 198042-10-002786. He didn't buy it through, but specifically from Kienle, and according to Kienle's invoice number 201960030 (dated October 31, 2019) for 1.3 million Euros (or 1.43 million Dollars). Further details of the piquant document included the predicate "matching numbers" as well as Kienle's note "The delivery remains our property until full payment".

The highlight of the mystery surrounding the fancy yellow roadster so far, however, is the previous owner from whom Kienle acquired the vehicle, according to information from his circle of friends. According to the report, the previous owner from North Rhine-Westphalia bought the car in 2017 for 1,075,000 Euros in order to offer it for sale again through Kienle as early as 2019. According to the report after Kienle had pointed out to the commissioner that the car was a fake, he bought it from him himself for 600,000 Euros. The purchase is said to be dated June 2020 – around eight months later than Kienle resold the car to the Sultan.

Bild The incorrect 300 SL Roadster with the forged chassis number ...2786 during its examination in Malaysia in 2023
The incorrect 300 SL Roadster with the forged chassis number ...2786 during its examination in Malaysia in 2023
Copyright / Fotograf: Steinacker Ingenieur-GmbH
The previous owner, who probably lost almost half a million Euros on the yellow 300 SL, is known to our editorial team by name. In a direct conversation, he is not prepared to comment on the ongoing proceedings. However, he is willing to confirm that he sold the car to Kienle as a fake for 600,000 Euros. This is the background behind how the matter could have considerably more unpleasant repercussions for Kienle, even though he did not forge the car himself.

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Further double numbers

This could be the end of this story for now. However, several other Mercedes-Benz 300 SLs have since surfaced that raise similar questions. Two of them, according to reports, were seized from Kienle customers in the fall of 2023. One, a black roadster, was on display at Kienle's large exhibition stand at the 2015 Retro Classics fair in Stuttgart – while another, albeit a white roadster with the same chassis number known to the editors, was offered at the same event by a fellow dealer. The other recently confiscated 300 SL is a Gullwing from 1955 whose matching-numbered, but historically documented and thus undoubtedly genuine counterpart is in the car museum at Caister Castle on the English west coast.

Bild The black 300 SL Roadster that has been seized in the autumn of 2023, shown here during the built-up of Kienle's exhibition stand at the 2015 Retro Classics in Stuttgart
The black 300 SL Roadster that has been seized in the autumn of 2023, shown here during the built-up of Kienle's exhibition stand at the 2015 Retro Classics in Stuttgart
Copyright / Fotograf: privat
Bild 1955 300 SL Gullwing in the car museum at Caister Castle, England
1955 300 SL Gullwing in the car museum at Caister Castle, England
Copyright / Fotograf: Caister Castle
Bild The Caister Castle museum's 1955 300 SL in 1962 at a club racing event in England
The Caister Castle museum's 1955 300 SL in 1962 at a club racing event in England
Copyright / Fotograf: privat
The next case concerns another 300 SL Roadster in black, which the public prosecutor's office also seized from its unsuspecting owner in Bavaria. He had purchased the car from Kienle and later learned that there were issues surrounding its identity. Investigations revealed that Kienle had previously had to take the car back from the former buyer – a Belgian collector and proven 300 SL connoisseur – following proceedings before the Stuttgart Regional Court, as a forensic report had revealed that the chassis number had been manipulated.

A later inspection of the vehicle showed that it had been manipulated once again between its repossession by Kienle and its resale to Bavaria, presumably by using a different chassis. Today, the car's chassis number ...0367 is stamped in a different place, this time correctly. As an aside, shortly before this research had been completed, Klaus Kienle had contacted the current owner, urgently advising him not to answer any questions from journalists. But even without such questions, it is now known where the original 300 SL number ...0367 is located: in the United States. It is a dove blue roadster with beige interior that had been auctioned in 2018 by Gooding & Company in Scottsdale, Arizona, for 1'083'500 Dollars.