Audi Case Studies, Blog, Car Repair and Servicing, Case Studies Audi Case Study 51: A4 Routine Servicing Posted on January 15, 2022January 15, 2022 by admin 15 Jan Miss Santhi Audi A4 visited Revol Carz Garage for the routine servicing and have a engine check light on her dashboard. Miss Santhi sends in her Audi A4 for a routine servicing. All car servicing car undergo a stringent check to ensure peace of mind for car owner! All car that visited Revol Carz Garage will also undergo a full computerize scan to ensure the car is in good running working condition. The malfunction knock sensor have been detected. The malfunction knock sensor have been replaced. All car servicing car will receive a complimentary car wash and vacuum. It’s a full positive Saturday in our Toh Guan workshop Scratches Restored Back with Perfection!