Hold down bars for Mercedes Benz 642 engines. The bars hold the camshafts in the head with the cam cover removed. Applications: 3.0L 24v V6 diesel engines found in C, E, G, M, R, CLA, CLK, GLE, GLK and GLS Class. Also in Sprinter, Viano and Vito vans (2005 - 2007). Equivalent to OEM 642 589 00 31 00. Can be used with the Laser Chain Tool Kit, Part No. 6740.