HIDDEN CHARGES: A special report.; Extra Costs on Car Loans Draw Lawsuits
Hidden Charges, special report on car dealers' lending practices that are under attack in several class-action lawsuits; car dealers and lenders are not required by law to tell consumers about role dealers play in setting interest rate on dealer-arranged car loans; as result, local dealers can add percentage points to loan without consumer knowing about it, and lender pays difference to dealer; this industrywide practice is called dealer markup; class-action suits call such markup fraudulent and deceptive business practice; one suit accuses lenders of participating in arrangements that charge black car buyers higher dealer markups than whites, regardless of their creditworthiness; lenders and dealers named in suits deny any wrongdoing; industry experts say money dealers make on markups can make difference between profit and loss for many dealerships; photos; chart; tips for car-loan shoppers from consumer advocates (L)