I don't know the specific technical answer to your question, M-B
engineers might.
But, I suspect the reason for such drive shaft dampers is to smooth the
pulses of the four cylinder motor vs. the smoother six cylinder motor.
Think about letting out the clutch to get the car moving from a dead
stop, the four's pulses may be felt slightly as the car begins to move
whereas a six cylinder motor's more frequent fires would not be so felt.
This isn't a drive shaft balance issue, it won't shake at any speed,
regardless of motor, if the shop balances the shaft. Balance is not the
reason for a damper, it's job is to absorb pulses.
I hope this helps you.
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© 2008 T.G.Lambach. Publication in any form requires prior written
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