This week on the Best of Car Talk, Steve is spending a lot of time helping his ex-wife Tammy navigate a trinity of car problems. Is he perhaps too invested, given the "ex" status of their relationship? Elsewhere, high schooler Natalie's Dad was away, so she borrowed his van, and (of course) got it dented. Can she fix it before Dad gets home, or does she need to 'fess up, or blame it on Mom? Also, Toast's battery drains in the rain; Julie has half a key stuck in her driver's door; and Jonathan's Volvo has a sagging rear end. Find out if Tom and Ray's resolution to stop giving stupid answers can actually make it to New Year's Day, this week on The Best of Car Talk.