No, it's not plastic, it's rubber. Here's a link. Notice there are two different sizes.
http://catalog.eautopartscatalog.com/mercedesshop/sophio/wizard.jsp?partner=mercedesshop&clientid=catalog.mercedesshop&baseurl=http://catalog.peachparts.com/&cookieid=1IY073OLX1J005JXJY&year=1983&make=MB&model=240-D-002&category=All&part=ST+Shift+Bushing

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2004 VW Jetta TDI (manual)

Past MB's: '96 E300D, '83 240D, '82 300D, '87 300D, '87 420SEL

Another acceptable solution that will save time and effort is just re-bush with some vinyl tubing or what have you. Fits over the ends of the rods and clips in. (PEH are you listeneing?)

No part number needed. No dealer rip-off.

That's what I did. I think it was 3/8" or 1/2" vinyl hose I had lying around. Cost about .0005 cents. Has worked fine for 2 years and if and when it ever wears out I have plenty more of it.

I also took apart and re-bushed the shifter assembly with some 3/4" PVC pipe (I think that was the size). That REALLY helped a lot as the ends of the assembly wear out the old bushing. I have lots of that stuff too, for the next time.

Rick

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80 300SD (129k mi) 82 240D stick (193k mi)77 240D auto - stick to be (153k mi) 85 380SL (145k mi) 89 BMW 535i 82 Diesel Rabbit Pickup (374k mi) 91 Jetta IDI Diesel (155k mi) 81 VW Rabbit Convertible Diesel 70 Triumph Spitfire Mk III (63kmi)66 Triumph TR4a IRS (90k mi)67 Ford F-100 (??)