2003 c 240 matic EMISSIONS

Engine Performance problem
2003 Other Mercedes Benz Models 6 cyl Automatic 82866 miles ---Model : C 240 matic

I took my car to be inspected, it failed code PO432 MAIN CATALYST below threshold, the guy at meinke could not repalce catalyic converter but he recommended an inductions service, he stated that might work any other suggestions, and is this a common problem with my make and model my friend also had this problem