Replace catalytic converter-1999 E430
 

One of my catalytic converter is broken inside so that it is blocking outlet. As result the engine missfires. I have two questions. Is it necessary to replace both converters or just the one that is broken? Second, is it necessary to use original parts as replacement?

Regarding the installation how difficult is it for an average person to do the replacement or is this something better done by a muffler shop or MB dealer?

Thanks for any suggestions?

Highwater

i personally would only use original if my budget allowed, and instead of a dealer find a competent independent mercedes shop in your area

Thanks Carson357. Are you able to suggest any discount source for original Mercedes parts? Thanks........Len