Founded in 1984, HK-ENGINEERING specialises in the restoration, maintenance and sale of Mercedes-Benz 300 SL Coupés and Roadsters. Based in Polling, Bavaria, the company combines traditional craftsmanship with a commitment to preserving the identity and original substance of each car.
Preserving a car’s original identity is central to HK-ENGINEERING’s approach. Each restoration begins with a detailed assessment of its components and a plan agreed with the owner.
Wherever possible, existing parts are carefully restored and returned to the vehicle rather than replaced. The aim is to retain the individual character of each 300 SL while addressing its mechanical and cosmetic requirements.
THE BEGINNING OF A PASSION
The idea behind HK-ENGINEERING grew out of Hans Kleissl’s experience restoring his own Mercedes-Benz 300 SL Roadster, which he acquired in 1979. Working on the car led him to develop a business centred on the particular requirements of this model.
That specialisation became the foundation of the company: building detailed knowledge of the 300 SL and bringing together the skills required to restore and maintain it.
EXCLUSIVITY AND PERFECTION IN BUYING, RESTORATION AND SERVICE
At the Polling workshops, preservation extends from mechanical components to the interior and paintwork. Existing materials and finishes are assessed individually, with restoration taking priority over replacement wherever their condition allows.
SPECIALIST EXPERTISE SINCE 1984
The Mercedes-Benz 300 SL remains at the heart of HK-ENGINEERING’s work. Since its foundation in 1984, the company has developed its expertise in restoration, maintenance and vehicle sales, while extending its sales offering to include selected classic cars from other marques.
Hans Kleissl
Hans Kleissl’s commitment to preservation extends beyond historic cars. Alongside his work with the Mercedes-Benz 300 SL, he has been involved in restoring historic buildings, including the monastery estate and Old Brickyard in Polling and Arendsee Castle in Brandenburg.
HK-ENGINEERING’s account of its history records an award received in London in 2014 recognising its restoration work. Kleissl’s architectural conservation projects have also received recognition, including a Federal Medal for Monument Protection for Arendsee Castle and a Bavarian heritage conservation award in 2021 for the Old Brickyard in Polling.
VISIONARY FROM THE START
Hans Kleissl was far ahead of his time in ensuring originality and the highest standards of quality. Today, Kleissl and his team have a wealth of experience that has made HK-ENGINEERING what it stands for today, craftsmanship par excellence.
Sales
HK-ENGINEERING’s current selection of Mercedes-Benz 300 SL Coupés and Roadsters can be explored on its official website.
CLASSICS
MOTORSPORT
CLASSIC CAR RALLIES – PREPARATION, PLANNING AND ON-EVENT SUPPORT
HISTORIC MOTORSPORT – SPECIALIST PREPARATION FOR THE MERCEDES-BENZ 300 SL
