A note also to anyone reading this thread. The %50 only applies to KE-III systems! My 1986 190E 2.3 8V has a KE-II system in it and uses a hair diferent method to set the Base Mixture using the Lambda tower. In the W201 body at least the CIS system was updated to KE-III for the 2.3 16V and the 1987+ 2.3 8V and 2.6 engines. So if anyone reading this has the KE-II setup then the mixture needs to be set diferently. With that you unplg the O2 with the engine running and at temp and take the reading at the X11 connector at pin 3. That is you base voltage, then you plug the O2 back in and set the Mixture to the base voltage reading you got previously, or there abouts, as it will wander up and down as it should. If memory serves me the voltage should be between 2.1 and 4.8!

__________________
~Jamie
_________________
2003 Pewter C230K SC C1, C4, C5, C7, heated seats, CD Changer, and 6 Speed. ContiExtremes on the C7's.

1986 190E 2.3 Black, Auto, Mods to come soon.....