General description Laser Tools In-Line Diesel Pump Locking Screw is designed for Bosch 5974, specifically for setting the injection pump timing on Mercedes-Benz vehicles. Technical specifications Compatible with Bosch 5974 OEM equivalent: 601 589 0521 00 Compatibility and accessories Applications include: 200D, E200D, C250D, E250, E250D, 250D, E300D, 200TD, 300TD, and 190D