New 2024 Ford Maverick Lariat, with rattle

Bought this vehicle last Thursday, dealer about 50 miles from home. Drove fine on test drive around the dealership. Drove fine on way home, but many slightly rough roads (rural Napa, Sonoma, Mendocino Co.) cause a definite rattle. I think it is coming from left front, maybe engine compartment, maybe under dash. Everything else perfect. Looked under the hood, found that the cover for the positive battery terminal was not installed and was hanging by its tether, fixed that, but did not change the rattle. Going for service tomorrow. Curious if anyone else has experienced same. Thanks for reading.