expression, ichidan verb
park a car
A set phrase meaning to park a car. 留める is a transitive verb, so the car is marked with を.
ここに車を留めてもいいですか。
May I park my car here?
彼は家の前に車を留めた。
He parked his car in front of the house.
More formal and technical term for parking a vehicle. 車を留める is a common, everyday expression.
Compound of 車 (car) + を (object marker) + 留める (to stop). The kanji 留 is used for stopping a vehicle, as opposed to 止める which is more general.