I had one break on my 190E 2.6. I know exactly the part that you are talking about. It's a rectangular tan plastic piece with a slot for the cable to pass though. The far end is concave for the ball end of the cable to rest in. It just snaps into place.

I went to the dealer and my parts guy just gave me the part. He also knew exactly what I needed before I could finish describing it.

The Ann Arbor dealership is the BEST!

I drive 50 miles to the dealer in Ann Arbor and avoid the one 5 miles away in Birmingham like the plauge.

__________________
Michael LaFleur

'05 E320 CDI - 86,000 miles
'86 300SDL - 360,000 miles
'85 300SD - 150,000 miles (sold)
'89 190D - 120,000 miles (sold)
'85 300SD - 317,000 miles (sold)
'98 ML320 - 270,000 miles (sold)
'75 300D - 170,000 miles (sold)
'83 Harley Davidson FLTC (Broken again) :-(
'61 Plymouth Valiant - 60k mikes
2004 Papillon (Oliver)
2005 Tzitzu (Griffon)
2009 Welsh Corgi (Buba)