omegabenz,

190E 2.3-16 models came with a limited slip differential as the base car configuration (standard equipment) and no other options were offered for electronically controlled ones or plain ones, to my knowledge.

beamonk,

I agree with the MBZ190E16V recommendation, get the differential filled with RedLine Oil Co's limited slip differential fluid, and see if it helps before trashing the unit. I use it, the "shockproof" stuff, and it quieted mine down quite a bit as it had developed a howl at highway speeds that was not so loud it hurt, but it was annoying. Gone now (4,000 miles). See their stuff at www.redlineoil.com. Good luck, Jim

__________________
Own:
1986 Euro 190E 2.3-16 (291,000 miles),
1998 E300D TurboDiesel, 231,000 miles -purchased with 45,000,
1988 300E 5-speed 252,000 miles,
1983 240D 4-speed, purchased w/136,000, now with 222,000 miles.
2009 ML320CDI Bluetec, 89,000 miles

Owned:
1971 220D (250,000 miles plus, sold to father-in-law),
1975 240D (245,000 miles - died of body rot),
1991 350SD (176,560 miles, weakest Benz I have owned),
1999 C230 Sport (45,400 miles),
1982 240D (321,000 miles, put to sleep)