Anthonyb,
So your cable could not be removed from the sheath? I wonder is this common to mercedes cables?
I have never tried to pull mine out so I have no idea on my cars...

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'99 S420 - Mommies
'72 280SE 4.5 - looking to breathe life into it
'84 300SD Grey - Sold
'85 300SD Silver - Sold
'78 Ski Nautique