A user control assembly is provided for use on a vehicle equipped with a processor, an armrest, and a plurality of vehicular systems each having at least one adjustable feature associated therewith that may be controlled by the processor. The user control assembly comprises a first button deployed in the armrest and coupled to the processor for selecting a vehicular system from the plurality of vehicular systems, and a first rotary dial deployed in the armrest and coupled to the processor for adjusting a first feature associated with a selected vehicular system.