This week on Car Talk, the headliner in Cheryl's Chevy is falling down, and causing a series of bad-hair days. She'd like to fashion a replacement. Can Tom and Ray offer any interior decorating tips, or just suggest she use a better cream rinse? Elsewhere, Brent's Audi is leaking very expensive "mineral oil" power steering fluid. Does he need to spend big bucks to fix his steering, or can he try a cheaper fluid, like, say, Filippo Berio Extra Virgin Olive Oil? Also, Keller's got a wobbling wheel, but a much too interesting name and graduate major to get a clear answer; and on Stump the Chumps we find out if Tom and Ray correctly diagnosed Tim's misdirected air conditioner, and if Tim was able to re-direct the repair bill to his mom. All this and lots more, this week on Car Talk.