East to check -- the chain will rattle at the very front on the engine, and bad tappets will be further back.

Get it checked out soon, a busted chain is $$$.

The good thing to know is that broken chains in a 560 are very uncommon.

What is you oil pressure at idle?

Peter

__________________
1972 220D ?? miles
1988 300E 200,012
1987 300D Turbo killed 9/25/07, 275,000 miles
1985 Volvo 740 GLE Turobodiesel 218,000
1972 280 SE 4.5 165, 000 - It runs!