Sorry to burst you're bubble with the "new" parts don't fail......I've replaced one on a 2003 W211 E500.

They are still failing but they are failing ALOT slower so they are now being picked up during servicing before they do any damage. The ones that are failing (rubber hanging out a bit, pulley no longer spiiner straight, but not yet failed) are beinge seen on any NA M112/113.

You'll be pleased to know that we're starting to see this fault infrequently and the upper sump replacement rate has dropped from one every 2 weeks to one every few months.

It's just unfortunate that when they do fail that they cause such expensive damage. When they fail on older holden/gm or fords they just get VERY noisy but no damage is done (except to the drive belt)

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Alex.

MB Tech
Sydney, Australia
Volvo 122S
W201 190D 2.5 manual
W202 C240
W203 C32