ZF 9-speed transmission misbehavior
The 9-speed automatic shifts harshly, lurches, hesitates, and can stall or drop into limp mode — powertrain complaints on these years dwarf everything else. Software updates tamed many; others needed valve bodies or whole transmissions. Drive it cold and hot: any lurch, delayed engagement, or stall is a walk-away unless priced in.
Ask for repair records covering this item. If it hasn't been addressed and the car is in or near the mileage window, price the $200–$4,500 repair into your offer — or make it the seller's problem.