Local dealer is servicing a clogged trap under warranty.
A customer at my friend's shop just brought in their '85 300D (CA model) with a plugged up trap oxidizer (or CAT whichever). The car was hardly able to drive up a nearby steep highway. Even with a head start it dropped down to a slow speed making driving dangerous.
Like a 240D would pass it easily! Best remedy is get rid of the mess. That is why I went out of state to buy my '85 300TD.

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'95 E320 Wagon my favorite road car. '99 E300D wolf in sheeps body. '87 300D w/ Sportline suspension. No more '79 300TD w/ 617.952 engine at 367,750, it was my annual driver to Texas and I sure don't miss it poor A/C heater system!