Neilsen CT4426 timming tool Mercedes Chain Driven Petrol EngineSpecifically designed for vehicles fitted with the chain driven 1. 6 2. 0 direct injection petrol engine. Supplied with small and large diameter clamp pieces to ensure the camshaft is correctly held in place. Supplied with special security bit socket for the camshaft pulleys. Designed to allow removal and assembly of the camshafts. Application: Mercedes Benz M133, M270, M274. These engines are found in the late A Class, B Class CLA, C Class and E