Thanks Larry! That worked.

Came up code 11. Air injection circuit short or open.

Well, ya, of course! I changed the air pump, but disconnected the clutch because I also ruined the hose between the air pump and check valve when I changed the pump out.

So now I have another question. Does the button test all system?

Or do I have to do the LED / shorting wire process to discover other faults in other systems using the other 14 test points?

__________________
Thank You!
Fred
2009 ML350
2004 SL600
2004 SL500
1996 SL600
2002 SLK32
2005 CLK320 cabrio
2003 ML350
1997 C280 Sport