Fan Speed Control

In Germany some of the 124 cars have a switch to control the fan speed, its shape like our temp control, with various air flow settings.
Has anybody or does anybody know if a variable switch can be installed on a US car to control the fan speed? I was thinking about taping into the high-speed fan switch; in the winter I would like to have more control over the airflow, any thoughts if this can be done?
thanks, timreid

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timreid
1992 400E
euro lights
500E sway bars
210 16in wheels