This has been kicked around over the years through a bunch of threads. I did a google search, "draining the oil cooler" and a bunch of stuff came up. seems most say it is not necessary, don`t get that much oil out, will strip the threads etc....... some good reading.

Here is one.
http://www.peachparts.com/shopforum/showthread.php?t=293337

I did discover the old 220 Diesels had a oil cooler drain, then eliminated when the W123 replaced it.

Charlie

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there were three HP ratings on the OM616...

1) Not much power
2) Even less power
3) Not nearly enough power!! 240D w/auto

Anyone that thinks a 240D is slow drives too fast.

80 240D Naturally Exasperated, 4-Spd 388k DD 150mph spedo 3:58 Diff

We are advised to NOT judge ALL Muslims by the actions of a few lunatics, but we are encouraged to judge ALL gun owners by the actions of a few lunatics. Funny how that works