"Leather door panels" refers to the sections on the inside of a car's doors that are covered with leather material instead of being made of other materials. Full definition
The quilted leather door panels and seats are succulent, as are the rich leather on the wheel and the headliner. (automobilemag.com)
Interior Trim - inc: Leather Instrument Panel Insert Leather Door Panel Insert Leather Console Insert and Aluminum Interior Accents (chicagomotorcars.com)
9 - 5 «Aero» models gain leather door panels, cruise control, a trip computer, upgraded audio equipment and an auto - dimming rear - view mirror. (saabmuseum.com)