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Upgrade to MCU 3.. I think

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Purchased a MS Raven post August delivery. Do you know how I can check if I am on 2.5 or 3?

Click the car icon in the bottom left -> Software -> Additional vehicle information

You will have MCU2. MCU is the 'display' computer.
The wild card is which Autopilot computer you have ... that'll be what we're looking for in Additional Vehicle Information.