RepairPal Certified shops can diagnose and repair your 2004 Mercedes-Benz S500. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.
probably need to take it to a local,trusted,independent,Mercedes Mechanic for a good estimate.just to replace the plugs on the Repair Pal Estimator is $563 to $761 Dollars!