Overview
1955 Mercedes-Benz 300 SLR appears on the official Forza Horizon 6 car list as a B Class (balanced sport) entry in the base roster. This page focuses on what the car actually means for everyday players: how it tends to drive in its class, where it fits inside Forza Horizon 6's Japan setting, how to think about a starting tune, and which other roster entries it naturally compares against.
If you found this page while searching for a single Mercedes-Benz model in Forza Horizon 6, you are in the right place. Everything below is built around the official list fields (year, class, pack, manufacturer) plus plain-language player notes. We do not invent horsepower numbers, hidden upgrade paths, or unlock guarantees that the official list has not confirmed.
Background and Forza Horizon 6 context
The 300 SLR was Mercedes' 1955 Le Mans-bound sports prototype, with a 296 hp 3.0-litre inline-eight developed from the W196 F1 engine. Stirling Moss famously won the 1955 Mille Miglia averaging 157 km/h over 1,000 miles, but Pierre Levegh's 300 SLR was involved in the 1955 Le Mans disaster, after which Mercedes withdrew from racing for decades. On the official Forza Horizon 6 car list this 1955 Mercedes-Benz entry sits in the B Class (balanced sport) bracket inside the base roster, which is the placement players come to this page expecting to confirm against the public source. Inside the same B Class (balanced sport) bracket, the closest comparison roster entries for players are 1965 Alfa Romeo Giulia TZ2 and 1968 Alfa Romeo 33 Stradale, which is the B Class (balanced sport) peer group this car is usually weighed against.
Driving feel in Forza Horizon 6
300 SLR was Mercedes-Benz's Le Mans and Mille Miglia racer — derived from the W196 F1 car with the M196S 3.0 straight-eight making 310hp. Stirling Moss won the 1955 Mille Miglia in a 300 SLR with the famous 10-hour average of 157km/h. In B-class events on Forza's long road circuits the 300 SLR behaves like the period prototype it is.
Where it shines
B class is one of the most popular brackets in the Forza community because cars feel quick but balanced. It works for Road racing, Street racing on shorter routes and most casual rivals.
Tuning starting point
Look for tunes that match how you brake. If you brake late, dial in slightly stiffer rear damping. If you trail-brake, soften the front anti-roll bar.
These are general starting points only, not a guaranteed competitive setup. Forza Horizon 6 community tunes that already have hundreds of downloads are usually a faster route than building from scratch, especially if you are not sure of the car's drivetrain or aero behaviour yet.
How to get 1955 Mercedes-Benz 300 SLR
This car is listed without an add-on label on the official Forza Horizon 6 source, so we treat it as part of the base roster. Forza Horizon 6 launches on May 19, 2026, and before that date the public Autoshow may not surface every base-roster car yet — players asking 'how do I get this car, it is not in the Autoshow?' on Reddit or the Forza forums usually find the answer is 'wait for launch day or a post-launch update'. After launch, base-roster cars are normally available through credits in the Autoshow, Wheelspins, Festival Playlist rewards, or the in-game showcase that introduces new vehicles.
