Hissing from center Muffler 190E
 

is this normal. its not very loud just a light hiss.

would appreciate any info on this matter

thanks
MPZ

Start the car. Crawl underneath. Look for holes. May be leaking. This is the easiest thing I know to do.

I don't know about your 190, but on my 560, its pretty much normal if its just a low hiss/buzz that should basically be the pump(s) working properly although if you feel it is abnormal, look over the system anway,shouldn't take long at all just to do that to be sure...:) Good Luck

Alan