what is it, CA model, and what could go worng with it?

It's a two chamber (side by side) sliver plated ceramic catalyst to trap and burn off soot.

What goes wrong with it? It will eventually plug from excessive soot (a tired turbo makes this happen faster) and/or the ceramic honeycomb breaks up. This in turn ruins the turbo.

If you have one, it will eventually fail, and MB will do a warrenty replacement of trap oxidizer with a trap catalyst in the tailpipe and give you a new turbo if the old one is damaged (they always are). Don't replace it yourself, this voids the warrenty!

My brother's SDL still had one when he got it a few years back, the local dealer wouldn't replace it until it failed. When it eventually completely plugged, they did the work, free!

Peter

Peter

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1972 220D ?? miles
1988 300E 200,012
1987 300D Turbo killed 9/25/07, 275,000 miles
1985 Volvo 740 GLE Turobodiesel 218,000
1972 280 SE 4.5 165, 000 - It runs!

On my car the catalyst and trap ox looked exactly the same. Here is what I did with my stuff.

emissions swap...part one

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'85 300SD (formerly california emissions)
'08 Chevy Tahoe
'93 Ducati 900 SS
'79 Kawasaki KZ 650
'86 Kawasaki KX 250
'88 Kawasaki KDX200
'71 Hodaka Ace 100
'72 Triumph T100R