As BenT notes, some round knob controls still make use of cables.
That's the case on my 93 Corrado, for instance.

Of course the mechanism has more than a passing resemblance to a Rube
Goldberg device....(and it isn't cheap either.)

On May 2, 2008, at 9:43 PM, John Bange wrote:

> If it was knobs, i bet it was servo controlled. One could probably
> adapt the parts from another vehicle to the Vanagon. Oh boy! Another
> project I'll never have time for!