The 770 was powered by a 150 bhp, 7,655 cc Mercedes-Benz straight-8 petrol engine with the "Kompressor" system, and had overhead valves and aluminium pistons. The 770S could achieve a top speed of 160 km/h and could also be fitted with a Root system supercharger. The contemporary boxed chassis was suspended by four semi-elleptical leaf springs, two at the front and two at the rear. The actual length of the 770 varied to the exact coachwork, but the most common dimensions of the first model, the W07 type, were 5.6 meters long and 1.84 meters wide. The gearbox was four speed forward, one speed reverse transmission, and of the forward gears third was direct and fourth was overdrive.
The 770 was revised in 1938 into the W150 model. The chassis was completely redesigned, made from oval section tubes and suspended from coil springs all around. Furthermore, an independent suspension was fitted to the front of the vehicle, and a de Dion axle fitted at the rear. The engine was essentially the same, except being modified to produced 155 bhp at 3,000 PRM instead of 150 bhp at 2,800 RPM. The gearbox was also revised to five speed forward, one speed reverse transmission, with fourth being direct and fifth overdrive.
The 770 was brought into production in 1930 to replace the older Typ 630. The 770 was known to be vehicle of ultimate luxury in Europe, and very few were manufactured, and none were available for commercial sale. The 770 is arguably best known for use by Adolf Hitler, Hermann Göring, and Reinhard Heydrich as staff cars, but also served as the personal transports for other high-ranking individuals within the Axis circle, including Emperor Hirohito, Baron Gustav Mannerheim, General Nikolaus von Falkenhorst, Erwin Rommel, Josef Terboven, and Vidkun Quisling. The 770, most notably the 770K, was the primary type used as Hitler's parade car, and it is claimed that these vehicles featured armor protection, however limited. Only some eighty-eight 770s were produced from 1930 to 1943, the last bodies of which were delivered in March 1944.