Hello everyone. Bought TLX 2015 2.4L base model from carmax 5-6 days back. Everything was fine , ride awesome (my first luxury car , was driving honda civic for last 17 years).
One issue while parking the car , today drove and put the car in Parking , can see the hood vibrating and if I touch the hood can clearly feel the vibration(even if I turn off the A/C). Opened the hood and let the car running and can see the vibration and noise also.
Though don;t feel any vibration inside the car while driving or being parked.
Car is under warranty with of 16 months and 18K on it.

Should I be concerned ?
Any suggestion will be helpful.