Any one know what this does?

[NewFoundFreedo]

Bought my Tesla used and noticed this today...

 

[finman100]

that's aftermarket.

my guess? some sort of sub-woofer volume control. Is there an aftermarket sub-woofer in the back somewhere?

 

[Tarball]

Clearly that's your turbo boost controller. Turn to max only when on race gas. A clearer photo might show PSI/BAR gradients!
Grats on your purchase!

 

[NewFoundFreedo]

No after market sub. Turbo Boost?

 

[jjrandorin]

No after market sub. Turbo Boost?

Perhaps they took their aftermarket sub out, but left the controller in? In any case, that is NOT oem equipment in any way, shape or form, so you will need to talk to whomever you bought it from to figure that out (or take it apart and start tracing wires).

 

[RayK]

My guess... volume control for the PWS.

 

[PSMod3]

You might check under the seat? There is a slimline sub by Kicker that can fit under the seats of some cars - we have one in our Jeep Wrangler - has a very similar knob.

 

[KenC]

Bought my Tesla used and noticed this today...

You realized your phone takes fuzzy pics?

If that's not it, you have a James Bond button, that will eject your passenger.