I will be looking at this car soon, to verify head casting number and transmissiom,,, Question will these parts fit and work in my 87 300 sdl,, Up here finding 300 sdl parts is very difficult. did this car have a 22 head and my trans is a 722.321 AC components interchangeable ? Any advice is welcomed.. ps my body is rust free but most of the cars up here are rusted,, so I prefer to keep the 87 up and running till my son gets it in 10 years
Mercedes-Benz Turbo Diesel 300 - Ontario Cars For Sale - Kijiji Ontario Canada.

I don't know how different the cars might be in Canada. Assuming they're the same as those imported into the lesser 48 provinces, the engine will be an OM606 non-turbo. This is a DOHC engine with a completely different head from the 603 engine that might have a #22 head. The engine in your 1978 model is probably an OM617 with 5 cylinders. The OM60x engines are longer; I don't know if they will fit in your '78 SDL. In any case, the 606 engines seem to have none of the problems of the 603 (and even those are somewhat overblown).

Jeremy

__________________

"Buster" in the '95

Our all-Diesel family
1996 E300D (W210) . .338,000 miles Wife's car
2005 E320 CDI . . 113,000 miles My car
Santa Rosa population 176,762 (2022)
Total. . . . . . . . . . . . 627,762
"Oh lord won't you buy me a Mercedes Benz."
-- Janis Joplin, October 1, 1970

There's a typo in the original post I believe. It should be 87SDL.

__________________
1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13

I have to proof read better sry my bad,, the llink shows the engine bay,, looks the same as mine,,

If it is a domestic model then it should have come with a 2.5L 5cyl. I am not aware that they put the 3.0L Turbo in 95s. I have a 91 from Japan with the 3.0L . In 95 I believe they came with a 606 Dohc Non turbo engine. The pic is clearly a turbo engine. I want to say that there were 3.5L 603 engines is some 350SDs, but was not aware of them being in 124 body cars. The good news is that the 603 3.5L head is going to be an upgraded unit (maybe a #17 or higher) over the #14 head in the 87, but $3000 is a lot to pay for a head. Cheers

__________________
It's always something simple
91 300D 603.960 (from japan) 194K
92 Toyota Diesel Landcruiser HDJ81-t 116K
02 Golf TDI new head courtesy of PO
87 300D
97 BMW 525 TDS Wagon 5spd
bunch of Onan and other diesel generators