Who's replaced their kats
I have been made recently aware that a clk has three kats. One that is located after the exhaust manifold and one two that are located before the resonator. Has anyone replaced all three kats and if so were there any problems with the check engine light? and what kats did you use? It seems that the First kat is a pre kat which I would likely leave alone but I would like to change the other two.