Failed emissions - where's my egr valve?
 

Hello all,I have a 1989 300e 165k miles, I took for Arizona emissions testing.Here are my results
my car standard
HC .88 1.60 pass
CO 9.23 15.00 pass
NOX 2.702.50 failed
In the past with other cars, if I failed NOX I would just replace the egr valve. I wish to do the same thing with this car, but I cant find it. I have looked everywhere. Can anyone advise me where to find the egr valve, or would sea foaming the engine work, or if there is anything else I should do to help pass NOX:? thanks in advance. I have already changed plugs and such.