My light isn't always on, but comes on quite frequently. My mechanic said it has something to do within the steering wheel, is an expensive fix, and not really anything to be too concerned about.

When it comes on, there is nothing I can do to get it to go off, other than shut down the engine and remove the key. It's off more than it is on, so it doesn't bother me much. I understand that the light coming on generates a code, so you can have your mechanic read the codes and figure out what is wrong with your car.

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-Steven

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1959 190b, totalled
1968 220D, sold
1969 230/8, sold
1980 240D manual, gave away at 300k (stupid me)
1985 190D 2.2 manual, gave away to a youngster
1989 300CE, sold when I retired - major regrets