Congrats on the new ride. But, it seems that you've already encountered the dreaded vibration issue. If you haven't seen those threads already, there are a couple of them discussing this very issue between the XC40/C40 Recharge forums:
www.xc40forum.com
www.xc40forum.com

Wheel Vibrations at Higher Speeds / Acceleration
Good Afternoon! I am curious if any of you have experienced vibrations at between 60-65 mph that can be felt in the vehicle and steering wheel? I also get vibrations during faster than normal accelerations from a dead stop or while still moving. I have taken this in to be evaluated. However...

Vibration
Anyone else annoyed by it? I expected the c40 to be "calmer" on the freeway.