Have it inspected by a professional , to correctly answer the question. OR if you know what to look for .... Does the clutch turn? Can you inspect the compressor for internal damage? Important to know , to determine the correct/best option for repair.
RepairPal Certified shops can diagnose and repair your 2007 Mercedes-Benz R500. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.