[Localbrew]

Ok, so here's the symptom/s; this pretty much started out of nowhere, meaning it didn't start lightly and get worse, it showed up one day and has not gone away. I started getting the horrendous rotten egg smell in the cabin, here are the facts.

2011 BMW 740LI 82k miles

Most noticeable coming to a stop, and then accelerating
Does not occur when traveling at speed
Dealer could smell it but checked "everything" and nothing came up (odd)
Dealer noted battery is from 2011 and should be replaced
When you have the AC on and the recirc function on you cannot smell the bad smell in the cabin
If the recirc function is off (outside air available) you can smell it pretty bad

I don't want to start replacing parts one by one but I need to get this smell gone it's pretty bad and super embarrassing.

I have also attached pics of the codes I found when I did a live data download.

The Fail screen shots were of the Exhaust gas sensors. I would really appreciate anyones help here.