The saloons were fitted with new wheels (15-inch), plus sport shock absorbers and so-called tropical springs – both of which were available as optional equipment items. These measures combined to raise the cars’ ground clearance by 35 millimetres. Then, after test drives on the British Army training grounds in Bagshot, it was also decided to reinforce the upper and lower sections of the semi-trailing arms.
In place of the standard gearbox, the rally cars were fitted with the four-speed manual gearbox from the V8 engine used in the S-Class (W116) of the time. A striking addition was the robust sand plate mounted at the front in place of conventional bumpers. In order to facilitate servicing and the supply of replacement parts, both British teams drove left-hand-drive vehicles.