Nice addition to your collection mpafleur.
I would recommend that you replace your crankshaft damper with a newer redesigned one if you still have the original one on your ML320.
My crankshaft damper went at 78K miles on my 98 E320 a few weeks back. I was fortunate that no major damage was done. The problem with the orginal designed crankshaft damper is that the rubber ring comes apart and could cause extensive damage from the drive belt and pulley being thrown around.
Do a search for crankshaft damper, harmonic balancer to see what I am talking about.
1998 Mercedes E320, 200K Miles
2001 Acura 3.2TL, 178K Miles
1992 Chevy Astro, 205K Miles