My experience with clutches with Mercedes is that they tend to wear with the release point moving higher and higher.

If your clutch slips and has a high release point, it sounds like it is worn out.

I have had both good and erroneous measures with clutch wear tools.

Haasman

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'03 E320 Wagon-Sold
'95 E320 Wagon-Went to Ex
'93 190E 2.6-Wrecked
'91 300E-Went to Ex
'65 911 Coupe (#302580)