02 · The record
A tool that became the ceiling
The most expensive car ever sold in public was built so an engineer could get to work.
Mercedes-Benz returned to sports-car racing in 1955 with the 300 SLR, a close relative of the W196 Grand Prix car. The engine is a straight-eight of about three litres, with desmodromic valves — the cam closes them, a spring does not — and mechanical fuel injection. Output sits in the region of 300 horsepower. The frame is a lattice of tubes. Its sills are so deep that an ordinary door will not clear them, so the closed cars use gullwing doors.
Uhlenhaut wanted a roof for high-speed road testing. Two coupés were built, and he used one himself. Period claims put them near 290 km/h. That is a claim from the 1950s, not a modern timed record, and this page leaves it there. The open 300 SLRs did the racing. Stirling Moss and navigator Denis Jenkinson won the 1955 Mille Miglia in one, at an average that still stands as the fastest Mille Miglia ever run.
In June, at Le Mans, Pierre Levegh’s 300 SLR was in the accident that killed Levegh and more than 80 spectators. Mercedes-Benz withdrew from the race that night and, soon after, from racing. The two coupés stayed with the factory. They had been tools. By surviving, they became impossible to replace.
On 5 May 2022 the company sold chassis 196.110-00008/55 through RM Sotheby’s, in its own museum, for €135 million. The sister car remains with Mercedes-Benz Classic. The photographs in this section were taken in that museum. They show an Uhlenhaut Coupé. They are not a claim about which of the two chassis is in the frame. One has left. Nothing in a current price list is in that position: two cars, one sale, and a racing department that closed the book seventy years ago.