See also:

ECO PRO
The concept ECO PRO supports a driving style that saves on fuel consumption. For this purpose, the engine control and comfort functions, e. g. the climate control output, are adjusted. In addi ...

Remove attached parts following use
Remove auxiliary mirrors, roof or rear luggage racks which are no longer required following use. Attached parts on the vehicle impair the aerodynamics and increase the fuel consumption. ...

1982: the second generation - four-door, Convertible, Touring and BMW M3, plus the first diesel engine for the sports sedan
The new BMW 3-Series oozed progress and variety out of every pore, as its fresh new design, optimised aerodynamics, improved space and comfort, higher output and additional body and engine variant ...