This week on The Best of Car Talk, Tom and Ray’s noble, but doomed, attempt to diagnose a problem with electrical brakes may have helped another listener resolve a different conundrum: Do two people who don’t know what they’re talking about know more or less than one person who doesn’t know what he’s talking about? Elsewhere, Rob needs to find a way out of a 5,000 mile road trip with his in-laws; Erin is on what may be a misguided quest to convince her husband to dump his BMW; and Kate’s Acura’s brakes slip when the temperature goes over 103, which seems extra serious since she lives in Las Vegas. So why are her mechanics looking at her like she’s crazy? All this, plus how not to set your sideview mirrors, and lots more, this week on the Best of Car Talk.