Sure you can - you're just forming your persona on the vehicle.
That is a possibility as well. The book is very vague.....

But you need to already be in AR or VR to "jump into" the vehicle
...
unless you are using a
direct connectionDoesn't seem as if you can form a persona on your control rig that let you "browse" the matrix wireless in VR.
...that if you you are in VR before you take the jump you already first based your persona on a device (like your RCC).
Then again, the control rig
does have a sim-module....
According to p 222 DNI and a sim module required for VR use
Having a persona might is not a requirement for VR use...?
....but then the question becomes "what matrix actions can you perform without having a persona"

For example, what Data Processing-limit would you use when you take a matrix perception test while in VR using the sim module on your Control Rig (and no commlink / RCC / cyberdeck) before you jump into a drone or vehicle?
Or can you only take matrix actions that does not require a test??
Jump into a rigged device is normally a Data Processing Test, but you don't need to take a test if you are the owner...
Entering a Host does not require a test, can you enter a host without having a persona...

(it doesn't really add up)