Well, if this was a dumb question, then I have an even dumber one. What's the "lambda?"

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" We have nothing to fear but the main stream media itself . . . ."- Adapted from Franklin D Roosevelt for the 21st century

OBK #55

1998 Lincoln Continental - Sold
Max 1984 300TD 285,000 miles - Sold
The Dee8gonator 1987 560SEC 196,000 miles - Sold
Orgasmatron - 2006 CLS500 90,000 miles
2002 C320 Wagon 122,000 miles
2016 AMG GTS 12,000 miles

Not a dumb question at all. It simply is adjusting the fuel/air ratio.

If you do a search you will find tons of info.

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2012 E350
2006 Callaway SC560