I was under car (85 300D) and noticed the main front pipe is heavily rusted and flaking. The next section up the muffler is also rusted, but not as much. I think this is just the second set op pipes since car was new. They are OEM pipes and very heavy duty compared with most aftermarket stuff.

At the moment, nothing is broken. But no doubt days are numbered for at least front pipe.

I was thinking of wire brushing the pipes and coating with POR heat resistant manifold paint. I used it on my rusty R107's manifolds and after many years still looks good. On those, I first treated with rust converter.

__________________
Graham
85 300D,72 350SL, 98 E320, Outback 2.5