See also:

Remove attached parts following use
Remove unneeded auxiliary mirrors, roof or rear luggage racks after use. Attached parts on the vehicle impair the aerodynamics and increase the fuel consumption. ...

1975: the first generation - premiere as a two-door sedan with high-output four-cylinder engines
The presentation of the first BMW 3-Series in July 1975 saw BMW write a new chapter into the automotive history books. The two-door sedan wasted no time in leaving its own distinctive stamp on the ...

Engine and differential
Always obey the official speed limit. Up to 1,200 miles/2,000 km Do not exceed the maximum engine and road speed: ▷ For gasoline engine, 4,500 rpm and 100 mph/160 km/h. Avoid full-thrott ...