There are several different components that make up the exhaust system in your Mercedes-Benz. These are all important to maintain and keep in good condition, as your car produces a lot of gases and fumes when you're driving. These fumes have to be expelled safely into the atmosphere. The muffler is one of the parts that is a part of the system. The muffler is responsible for reducing the amount of noise created by your engine. There are a range of things that can happen if your muffler is wearing out. The most obvious is an increase in engine noise. You could have rust building up on your muffler that is causing this, or cracks in the pipe. These things can cause growling sounds to come from your engine and also can cause a drop in performance on the road. You can also experience reduced fuel economy in the event your muffler becomes worn. Be sure to get an OEM replacement muffler for your Mercedes-Benz here on our site if needed!