I have been chasing down an elusive noise in the vacinity of the center muffler/resonator of my wife's 1981 300SD. I replaced the exhaust system with one from Pull-a-Part. No improvement. I decided to cut the center mufflers open to see what I could see. The left muffler looked normal - full of insulation and a lot of carbon. The right muffler surprised me in that there was absolutely no insulation in the main compartment on this muffler!

Was the insulation left out on purpose or was this a manufacturing error where Dieter and Hans were having a bad day?

Thanks.

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Tom Evans
69 280SE 91K (wish I still had it)
73 220D 98K
78 300D 134K
78 300D 185K
81 300SD 301K (still have)
82 300SD 321K (still have)
84 300D 268K
84 6.2 Diesel GMC Suburban 225K (a whole different story!)