turbodiesel is right. If it's an 87, it's a 300SDL. If the VIN begins with WDBCB25, it's a 300SDL. If the engine number begins with 603.96, it's a 300SDL.

I haven't read much if anything about 350SDL head warping. The 350SDL can have problems with connecting rods. It's the 300SDL that has problems with the cylinder head, and it's more like cracking than warping. If you have other information, please share it with the forum.

The trap oxidizer was removed under recall because it can or did disintegrate. When it does, it sends debris into the turbo which can damage the turbo. What would concern me is not that the turbo was replaced at 116K miles, but that if the trap disntegrated and caused damage to the turbo, did it cause damage further downstream? If it's held on this long, I'm sure it's fine.

I assume your trap was removed and replaced with a plain pipe covered in shiny wrap. If there's a 6-8" cylinder on the passenger side of the engine bay, you still have a trap. If there's a 3-4" cylinder, you don't have a trap.

I haven't read anything about the cat causing problems, though I've had a recognized tech tell me the cat should be inspected or replaced every 35K miles or something like that. It's the first and last I've heard of it.

If the vacuum pump has not been replaced, plan to have it replaced before 150K miles.

Sixto
91 300SE
87 300SDL