At 1730 hours Sta 48 was alerted for a vehicle fire with possible extension into a trailer along the 3300 block of Berrytown Rd. Engine 48-4 responded under the direction of Past Chief K. Sipple to find a vehicle fully involved with smoke inside the structure. Engine 48-4 extinguished the vehicle fire and protected the exposure. Engine 48-3 arrived, and forced entry into the trailer finding that extension was minimal.