So, I elected to check the flasher switch since it was much easier to get to and I disassembled it, cleaned it and put it back together. It clicks nicer now, but it is not clear to me that it is working correctly. When I took the bottom plate off, the thing with the electrical connection prongs, one of the arms of the position changing lever, the orange colored rocker switch, was broken off and the other one had the little round "ball" broken off.

But, it seems to be working as a switch, yet the blinkers don't work. The four way flashers work, but it seems possible the "off" position which should enable the blinkers, may not be making correct contact with those broken parts. I may buy another switch tomorrow and see if that fixes it. Taking the steering wheel off with an air bag in there is a little scary. Jim

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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)