hey

I have a 1998 C43 AMG. ANd it has the m113 engine. I bought it from a diffrent state and it has 75k on the clock. Now my engine is making a weird clicking sound and it sounds like a loose belt or something? What does a bad crank shaft balancer sound like at idle? when i am in neutral and i push on the gas some the clicks speed up.. does this sound like the same problem? Also if i go to my local MB dealership will they fix it for free since it is a common hazard? is there any recall or something? what should i tell them? TIA