5.5 inch length in the rear door, and more legroom in the backseat.
I used to drive a euro spec W126 280SEL. Then I got a 300SD. I fell in love with it, but I sold it later because of rust. Now I have a 300SDL, and a 350SD. The latter I would not recommend because of failure rates in engines. I bought my 350SD with a new updated engine already installed.
I also acquired a 300SE, which is a lot like my euro spec 280SEL was. A real screamer, and a 3.46 rear-axle to boot.
1987 300SDL (324000)
1986 Porsche 951 (944 Turbo) (166000)
1978 Porsche 924 (99000)
1996 Nissan Pathfinder R50 (201000)