Please look at pics > can you ID this piece?
 

I found this recently found this in my carport. I suspect it came out of the exhaust of my ‘92 300TE. Do you know what it is?

If the peices are hard and brittle my guess is you have lost inner baffling of your resonator.

I would try tapping on the exhaust system and listening for loose pieces inside.

Haasman

looks like the baffler plates inside of a muffler to me ...

With the car out of the garage: stand approximately where you found them. Look up. Do you see sunlight or a hole in the roof? If so it's some sort of meteorite. :P

Does your car have a inner hood pad?

could be the innards of your catalytic convertor .sorry for the bad news

Definitely not Hood Pad. Cat would be bad. Could Cat make it through the system?

I'll go with the baffle theory.
Just can't see how pieces of a catalytic converter could make it all the way through a muffler. ;)

They look curved. Cat pieces wouldn't be curved.

Looks like the sliding mesh exhaust seal behind the cat is flaking off. There are two seals , one is a hard steel donut ring and the other is a mesh type that floats so that the expansion rate of the pipes is isolated behind the cat... check there ,, it will be the outer/passenger side one. The inner is a solid fixed joint.