Mercedes-Benz Trucks Engine Plant

Production Powerful Engines for Mercedes trucks
Mercedes-Benz plant in Mannheim. Assembly for Actros, Arocs and Antos
Right at the beginning, before the crankcase is connected to the right engine mount, it is given an engine number. From now on, the engine-to-be is already twinned to a truck order in Wörth or in one of the other assembly plants. The first assembly step is fitting the crankshaft. This is followed by the connecting rods with steel pistons, mounted on-site, then the cylinder head, which has been pre-mounted at the side of the line, with the two camshafts. Four electric, angle-controlled screwdrivers then tighten the 38 cylinder head screws with 450 Newton metres torque each. The high cylinder pressure of up to 235 bar requires a robust design!

At the rear assembly stations, the truck's engine is given its turbo-compound unit – a turbocharger that transfers the remaining exhaust energy to the crankshaft. Only then is the "first" turbocharger, which supplies the combustion chambers with fresh air and exhaust gas for exhaust gas recirculation, fitted.

At the end of the line there is a quality gate and also a leakage test. Following this, every single engine has to pass a 19-minute heat test. There are six engine test benches. Filled with working-temperature oil and coolant, linked up to fuel and electronics, and equipped with dozens of sensors and measuring devices, each engine must prove that it fulfils all the requirements regarding injection pressure, temperature and fuel consumption – or in other words, that it has earned its star.

This is followed by clear varnishing and a last visual check before despatch. Every single engine that leaves the building is one that the eight and a half thousand staff at the Mannheim works are proud of. They know that each one is the heart of a truck that its driver and owner can place their full trust in.

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