When starting the vehicle, the cluster needles will ‘sweep’ their entire range.
17 - Instruments coding Byte 1 Bit 0 Activate
Interestingly, it failed the first two times I tried it, like this:
but the third time it worked. I have no explanation as to why.
(sorry for the crappy pictures)
It's a little disapointing that the fuel and temperature gauges don't also sweep. But it's a cosmetic mod, not functional, so I'm not going to whine about it.