karayjay

So I am getting a light clog issue and it seem to be the rear cats if that is what there are. The car is a bit sluggish on take off often. I am not seeing any O2 sensor holes so I could be wrong, can someone tell me where the O2 sensors attach on a2006 clk350?
My thoughts were to weld 2 12 inch straight pipes but then I would be running with only 2 02 sensors. What are the 2 in the rear some say not cats mini mufflers or resonators. Any one have any tips or info or dimensions of the pip OD or ID for the rear before and after cats area? I have no issue having a shop do it but I am worried about having 2 O2 sensors in the rear not connected and screwing up my Air Flow Sensor readings

karayjay

I figure out the O2 sensors. one before and one after the CAT the rear one are more like baffles guess I know the resonator is the long one in the middle after the split.

So I need Dia info only now ... The inside and out side diameters of the exhaust by the rear 2 baffles

Getting new codes now P0410 secondary air pump. I will test that . My son says the pump is sporadic on turning on in the morning . The other is P0175 which could be because of the air pump or 02 bank 1 sensor 2 after the cat. Or the MAF sensor that is new but after market ..