Changing the oil in the new to me 220d (you just have to love those pot oil fillters, eh?) Anyway, lo & behold, on the oil cooler there is a drain plug, to get all that nasty oil out. sure enough oil did come out...

Now, on my 240d and 300d there is no drain plug on the cooler. Wonder why the change? Perhaps the difference between 1971 oils and 1984 oils characteristics maybe later on MB oil people decided the oil cooler didn't have to be changed, or they just cut costs???

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71 220D 169K wrecked
83 240D 118K sweet 4 speed
91 350SDL (one of the 60% good engines) 156K
84 300d (loaner to my sister) 189K
79 300SD (partswagen)
86 420SEL partswagen
70 220d (partswagen)
68 280s GASSER!!! under construction now
85 300sd 310K miles winter beater car retired
93 300d 2.5 turbo 168K wife's car
83 280SL euro 5 speed 155K
69 250S newest project 54K