Features the first use of the line: "What's the plan, Phil?"
"The old wagon", the episode is named for, is a beige 1983 Ford Country Squire LX ( note the aluminum wheels ), which is identical to the one seen in Revenge of the Nerds (1984).
Phil's line when getting everyone out of the car "slow is smooth and smooth is fast" had been used by him previously in the episode Airport 2010 when the family was going to Hawai'i and he was getting them out the door.