I cannot locate the coolant drain on the block of a 1998 E300TD, OM606, W210. I have the Star DVD and the manual by Peter R. The graphics are not helping me.

Look on passenger side near block heater plug.

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2009 E320 Bluetec 117,000
1995 E300D 306,000 Sold
1996 Ford Taurus LX 130,000 Sold
1985 300TD Still 225,000 Sold
2016 Ford Fusion 24,900

It's a bolt with a nipple fitting. Put a hose on the nipple, direct the hose to a container, and crack the bolt to drain with no mess.

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The OM 642/722.9 powered family
Still going strong
2014 ML350 Bluetec (wife's DD)
2013 E350 Bluetec (my DD)

both my kids cars went to junkyard in 2023
2008 ML320 CDI (Older son’s DD) fatal transmission failure, water soaked/fried rear SAM, numerous other issues, just too far gone to save (165k miles)
2008 E320 Bluetec (Younger son's DD) injector failed open and diluted oil with diesel, spun main bearings (240k miles)

1998 E300DT sold to TimFreeh
1987 300TD sold to vstech

I have a 606 out of car and will try to have a look. Since the 606 is similar to a M104, have a look passenger side block about cylinder 5 . The drain plug is really a big brake bleeder screw. ( 3/4 " 19mm from what I recall ) Attach a hose to the valve to eliminate splash.

It's a big fitting that takes a 22mm wrench IIRC. By hose they mean garden hose.

Sixto
MB-less

on MY car, non-turbo OM606, 'tis quite easy because there is no turbocharger blocking the path. I believe it is 19mm on my car. It is close to the block heater, so if the cord is installed you can follow that to the heater, and then the drain plug is either right in front of that or right behind that.

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Respectfully,
/s/
M. Dillon
'87 124.193 (300TD) "White Whale", ~392k miles, 3.5l IP fitted
'95 124.131 (E300) "Sapphire", 380k miles
'73 Balboa 20 "Sanctification"
Charleston SC

its near cyl 5 and its a 19mm bleed nipple, it takes a 3/8 hose (if you want) with my NA engine I can reach in with my socket, half extension and ratchet to unscrew it slightly from the top. Once loose remove socket install hose by feel and unscrew the nipple to let it drain into the same tub that the radiator is draining into.

A picture for you

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2012 BMW X5 (Beef + Granite suspension model)

1995 E300D - The original humming machine (consumed by Flood 2017)
2000 E320 - The evolution (consumed by flood 2017)