This is from the January 1993 "Technical Data Passenger Cars".

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83 SD

84 CD

That is factually and mathematically incorrect.

I never made any statement whatsoever regarding the 617.951 engine.

The information which I provided is applicable to the subject vehicle (presumably a '85 300D with a 617.952 engine) and is accurate per the 617.95 FSM for the W123 chassis.

It is worth noting that coolant capacity is a function of chassis and engine combination and cannot be defined on the basis of the engine model only.

That is a factually incorrect statement on both points.


You made a statement regarding the 617.952 engine, and, the data which I possess shows the two engines to have identical capacities.

It is worth noting that my data doesn't agree with whatever you've managed to unearth.

Who's gonna have the last word? I hope the OP got what he needed from this thread...

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1989 300E 144K

Guys, enough already. Some of us depend on these posts for some quality advice. Don't need the squabbling. There are now 2 seaparte documents posted earlier which show the proper amount for the stated engine. Let's move on.
Now, you guys glossed right over my post. So I'll ask again and hopefully get some helpful advice Does any have a detailed procedure to perform the complete flush on the 606 engine? A 99 E330 TD? A pictorial of the engine would help, as I don't even know where the block drain plug is. Last time I did it, I only flushed the radiator, which I know is an incomplete job.

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Mike Mass
Freehold, NJ

1999 E300 TD 178,000 miles
2007 E320 Bluetec - Sold

1998 E300 TD - R.I.P.

Absolutely not. Your attempt to hijack the thread was duly noted!!!

Egads! You only flushed the radiator! My god, how do you sleep at night, sir!

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1989 300E 144K

I believe that was noted previously, but I am happy to note it again.

Having personally drained over three gallons of coolant from a 617.952 equipped W123, I am going to go out on limb and suggest that your data is flawed. But finding conflicting data in an official MB publication is not exactly unheard of. As previously indicated, my data was from the MB 617.95 FSM, as specified for the W123 chassis. The Owner's Manual for my '82 300D also indicates a coolant capacity of 12.5 liters.

The Owner's Manual also contains a table listing the volume of antifreeze required to attain specific protection levels.

The data I posted is from "Service Manual, Engine 617.95 Turbo Diesel" and my results in draining and refilling the system correlate very closely to slightly under 12 quarts............matching the 11 liter statement in the manual.

If you're able to get over 13 quarts into a 617.95...........you deserve an achievement award for such a feat.

FWIW, my copy of the service manual (20-010) says 11L (including heater), but my '83 owners manual says 12.5L.

It looks like we "unearthed" the exact same publication!!! Take a look at page 00-020/3.

Of course, that same page claims that the water pump is "maintenance free." If that's the case, why does the manual provide maintenance procedures for the water pump?

You're correct. The same manual lists 12.5 liters in that section.

So..........I have no idea which is correct............although getting 13 quarts into the system is not going to be easy. This could also be the result of residual coolant that won't drain even with the block drain removed.

When I recently did the W-126, I blew out the lines into the heater core to ensure that this did not compromise the new coolant. I was unable to get 12 quarts into it............even though I carefully filled the head.