either on new thread or reply, pull down to "manage attachments" click on and follow the leads. click on browse then click on your attachment after reducing the size if needed and upload. the cel indicates secondary air injection, could be something other than the oxygen sensor, including air flow sensor. that was my cel problem on my slk with the same issue as yours. coming on after setting idling. intermittent.

 

If there was a problem CEL from the air flow sensor would I see any change in the way the car runs or performs? Idle is 550, starts 1st time everytime, no misses to 4-5000, shifts properly.

I'm old and have tried to follow the upload directions. Is it the same to put the car picture in my garage?

 

the only thing the air sensor did on my rig was the cel coming on and that was the only problem that occurred when idling for an extended time. this was so intermittent the light eventually would go out on it's own after about 100 miles, only to come on again in time. it can cause other running issues too and I'm not saying that is your problem. it was on my slk. some try cleaning it, I replaced mine.