I've recently been given an 83 300SD (turbo) and don't have a manual on it, and I'm wondering what the dummy light on the dash that's marked "0" 2 (as in 0-squared) is in reference to? And how do you check to make sure it's working correctly, what would it indicate if it was on, etc? My 81 300D doesn't have it.

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"Knowing is not enough, we must apply.
Willing is not enough, we must do." Goethe

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1951 Chevy 3100

2003 Indian Chief Roadmaster

1983 GMC 1 ton Dually

1982 Chevy 1 ton Dually, service body (sold)

'90 GMC Suburban 6.2 "SS Veg-Burban"
(single tank WVO\diesel conversion) SOLD

'81 300D ~ Mama's car...my job (now my car)(but still my job) SOLD

'83 300sd ~ rescue car SOLD

2005 Ford Taurus (Mama's new car)(NOT my job!)