if there's an "x" looking marking over the little light bulb, it's telling you to check for an external light bulb that's not coming on when it should. Parking lights, brake lights, turn-signal lights and back-up lights are all included in this circuit.
RepairPal Certified shops can diagnose and repair your 2005 Volkswagen Passat. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.