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by Bernd S. Koehling (Author)
Mercedes SL R129: A Rising Star Among Collectibles
The Mercedes SL R129 has become increasingly collectible, with well-maintained examples fetching a premium price. The V8 versions are naturally the most popular, but the V12 is a special case - buying one that isn't in perfect condition is a surefire way to run into costly issues. Updated in March 2025, this guide provides comprehensive information on the R129, covering its development, history, and the various engine options, from the 300SL to the SL73 AMG. It also explains the chassis number and data card in detail and offers a revised and extended new buyer's guide.
Accompanied by excellent, recent photos, including shots of the suspension, this guide covers the following topics:
- A new buyer's guide: The extended buyer's guide covers in more detail all six-, eight-, and twelve-cylinder engines, all transmissions, including the rare manual version, the suspension and potential electrical issues.
- The Development of the R129: A detailed exploration of how the R129 was developed, its key features, and its place in Mercedes history.
- Safety Standards and the First Integral Seat in an Open Car: The R129 was a pioneer in terms of safety, introducing the first integral seat in an open-top car, enhancing protection for occupants.
- The 500SL and 300SL-24 (300SL in the US): Focus on the 500SL and 300SL-24 versions, with details on the US-specific 300SL model.
- The V12 Arrives: The introduction of the V12 engine marked a significant step in the R129's evolution, offering unparalleled performance.
- The 1995 Facelift: A closer look at the changes introduced in the 1995 facelift, including updated design elements and improved features.
- The 1998 Facelift: A further evolution of the R129 with a 1998 facelift, which refined both design and technology.
- The Navigation System: An examination of the navigation system and its role in the R129's technological innovations.
- The AMG Models, from the SL36 to the SL73: A detailed overview of the AMG variants, from the SL36 to the high-performance SL73 AMG, and their unique features.
- The Special Editions: Coverage of the special editions, including the "Mille Miglia", US "La Costa", UK "Heritage", and "Silver Arrow Edition".
- The Tuning Scene, from Brabus to RENNtech: The R129 was a popular model for tuners, with notable companies like Brabus and RENNtech offering modifications to boost performance and aesthetics.
- Driving a RENNtech SL600 7.4L: A look at the RENNtech SL600 7.4L, a tuned version that takes the R129's performance to new heights.
- The Middelhauve SL600 and Karman R129 Gullwing SL: The Middelhauve SL600 and Karman R129 Gullwing SL are unique builds that have become legends in their own right.
- The VIN/FIN Explained: A breakdown of how to read and understand the VIN/FIN of an R129, helping you decode its history and specifications.
- The Data Card Explained: Learn how to read the data card and what each code and number means.
- Technical Specifications and Production Figures: A thorough analysis of the technical specifications, performance data, and production figures for all R129 variants.
Author Biography
With over 25 books and e-books written about Mercedes-Benz cars, Bernd S. Koehling has proven to be an authority on the brand. The books cover cars from the 1936 170V to the 2012 SL R231.
Bernd has been involved in the Mercedes scene since the early 1970s, when he restored his first pre-war 170 Cabrio B. Since then he has not only owned many classic Mercedes including a 220S, 300d Adenauer, 200D, 250SE, 280SE coupe 3.5, 300SEL, 350SL, 280E, 450SE, SLK230. He has also gained a wealth of knowledge and experience, which he shares with his readers in his books. Mercedes has always been considered one of his favorite car manufacturers and Bernd has driven almost all Mercedes models built since the 1950s. His other weakness revolves around British cars, here especially Jaguar and Alvis.
