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To adjust the valves on a 1989 Mercedes-Benz 300SE with a 6-cylinder engine, first, ensure the engine is cold and remove the valve cover. Use a feeler gauge to check the clearance between the rocker arm and the valve stem, then adjust the clearance by turning the adjusting nut on the rocker arm until the correct gap is achieved, typically 0.10 mm for intake and 0.20 mm for exhaust valves. Repeat for each valve, ensuring to rotate the engine to access all cylinders, then reassemble the valve cover and check for leaks. Always refer to the vehicle's service manual for specific torque settings and detailed procedures.

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4d ago

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