LeGrand 1/8 Collection Mercedes 300 SLR Uhlenhaut Coupe 1:8 metal kit LE102

One final detail: only two Mercedes 300 SLR Coupes were ever produced, compared to 1400 of the 300 SL gullwing street cars.

LeGrand 1:8 Mercedes 300 SLR Uhlenhaut Coupe kit building resources:
instruction manual | official assembly videos | German build journal (not ours, must translate)
* approximate overseas shipping cost (rates vary greatly depending on local postal service size limits):
Hawaii $225.; Puerto Rico $175.;  CZ $235.;  FR $180.; MX $120. (via UPS); ES $195.; NZ $320. 
LeGrand 1/8 Collection Mercedes 300 SLR Coupe metal kit LE102

What is the difference between the 300 SL "Gullwing "street car and this 300 SLR racer?

They both have gullwing doors, intricate tubular frames, and may seem very similar. But look at the bodies and you will see the 300 SLR racer has a more streamlined and sculpted body, a meshed air intake in the hood, a tubular racing exhaust that exits the right side of the car, no bumpers, and many other detail differences. Under the skin they diverge even more, the 300 SLR being based on the W196 GP racer using a straight 8 cylinder engine vs 6 cylinders in the 300 SL, racing style inboard brakes and 16 inch wire wheels. More explanation below in scans from a great reference book we can provide.

LeGrand 1/8 Collection Mercedes 300 SLR Coupe metal kit LE102
The Mercedes-Benz 300 SLR "Uhlenhaut Coupé"
This coupé version of the 300 SLR racing car was developed by Daimler-Benz for the 1956 season, and only two 300 SLR Coupes were constructed. It was designed under the supervision of the then head of the MB racing car department, Rudolf Uhlenhaut and the nickname "Uhlenhaut Coupé" is a reminder of this today. It was never used in racing because Mercedes Benz withdrew from motorsport after the end of the season in 1955. The Mercedes-Benz 300 SLR is still one of the most spectacular and expensive super sports cars ever built, and way ahead of its time.
8 Cylinders | Displacement 2982 liters | Output 302 hp @ 7500 rpm | Top speed 290 km/h (180 mph) | Production period: 1955
Mercedes-Benz and the design of the enclosed product are subject to intellectual property owned by Daimler AG and are used by LEMKE Collection GmbH under license.

The kit can be built as the original version of the car (left) or as modified later for road use (right) with a hood scoop, air deflector, and alternate cowl vent panel.

LeGrand 1/8 Collection Mercedes 300 SLR Uhlenhaut Coupe 1:8 metal kit LE102
LeGrand 1/8 Collection Mercedes 300 SLR Uhlenhaut Coupe 1:8 metal kit LE102
LeGrand 1/8 Collection Mercedes 300 SLR Uhlenhaut Coupe
metal kit LE102 | $1300. plus s/h | in stock!
    
The body is die-cast metal and pre-painted. Real metal wire wheels are constructed from individual spokes and include two spares in the trunk. The kit contains more than 900 precision parts made of metal, rubber, textiles and pre-colored high quality plastic. Most assembly is with screws, minimal glue required. Steering and suspension are functional, doors and all body panels open. Can be built as the car was first produced, or with later hood modifications as shown in the bottom photo. Kit includes a compartmentalized screw box and magnetic screwdriver.  
over 900 parts | finished dimensions 540 mm x 200 mm x 150 mm (21" long x 8" wide x 6" high) | weight 8 kg (18 lbs)