the last reply is correct.look at the two nuts that hold air cleaner to top of engine.the 420 is mounted to 2 L shaped brackets to the valve covers the 560 mounts directly to the rubber mounts only.
David S Poole
"Fortune favors the prepared mind"
1987 Mercedes Benz 420SEL
1988 Mercedes Benz 300TE (With new evaporator)
2000 Mercedes Benz C280