I took the Mercedes to a shop nearby today. The mechanic told me the pipe that connected on the end of the catalytic converter fell loose or broken. The other end of the pipe that is connected to the front muffler is intact. I asked the mechanic is the pipe is welded or clamp between the catalytic converter and the muffler. He said both ends of the pipe are clamped. So, the only thing for me to do is to jack up the end or front of the Mercedes or both, get underneath the Mercedes and see what is exactly for sure I need to do. If the pipe is broken and needed to be replace, that is good. I am somewhat mechanically inclined. I just need to figure out what is the name of pipe (exhaust?) and part number to make sure it is the correct part. Possibly needed additional new clamps to hold and connect the pipe to the catalytic converter and the muffler. Feedback anyone?