trany cooler - Mercedes-Benz Forum

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post #1 of 4 (permalink) Old 05-10-2010, 09:15 AM Thread Starter
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trany cooler

Does the Mercedes Benz have a dedicated (separate) transmission cooler or it is incorporated with the radiator like most of other cars?

I don't owe any model yet but was thinking about buying late 199X or early 200X model C-Class or S-class model.

From my experience owing two Volvo's dedicated tray cooler lowers substantially the transmisson fluid temperature.
I was experimenting with with my "Bricks" and on a hot sunny day (+27C) driving the car for 30min in a city without dedicated trany cooler (cooling from radiator) the trany return temperate line was about +97C

After installing dedicated trany cooler the return temp. line was below 65C so this is a big difference, and this temp was measuring the temp on the metal return line.
Heat is the biggest enemy of any transmission.

My other question, will I have a room to install transmission cooler on C230 or 430 engine?

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post #2 of 4 (permalink) Old 05-10-2010, 09:34 AM
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27C hot? Our vacations often takes us to Las Vegas, where temperature in shade exceed 40C, while open parking lots or desert can reach 60C.
MB do have transmission coolers build into main radiator. Besides the flex hoses deterioration at about 15 years mark, never had a problem.
Cold transmission is not a good thing. The reason for the trany cooling element build into radiator is to warm it up on cold days as well.
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post #3 of 4 (permalink) Old 05-10-2010, 09:52 AM Thread Starter
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Well, comparing to -30C in Alberta we get at time to time in winter 27C is a hot temp.

If you run synthetic ATF (like I do on my bricks) even with external trany cooler at below -30C I never had any problem with the tranies in my bricks; and they are 24 and 22 years old respectively.
Doesn't matter what anybody says I always install trany cooler, this is the best protection you can get.

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post #4 of 4 (permalink) Old 05-10-2010, 02:14 PM
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The transmission cooling of Mercedes is adequate/satisfactory and there's no reason to sweat it.

Kent Christensen
'07 GL320CDI
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