muffler fell off

[Mercedes Fred]

my muffler fell off, '88 300e; i got stuck in a snow bank a few weeks back and i think it stressed the exhaust system- the car was bottoming on hard packed snow at the rear;

ive got the muffler and it looks a little rusted around the joint where it connects to the pipe; has anyone rewelded such a thing, or is it a sign for a new system (kinda expensive)

btw, its not that noisy without the muffler, so im wondering if attaching an extension or bosal pipe/muffler thing will suffice.