M-Class (W163) Produced 1998-2005: ML 230, ML 320, ML 350, ML 400 CDI, ML 430, ML 500, ML 270 CDI

Transmission problem. 400cdi w163

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Old 07-07-2017, 07:23 AM
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Transmission problem. 400cdi w163

I have W163 400cdi. I used to tow. While I drive 100km the transmission overheat and won't change gears. First time use 1,2,3,4 gear after 1,2,3. My fuel economy is catastrophic. What can I do?
Old 07-07-2017, 11:50 AM
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1999 E300TD
What and how much are you towing!
Old 07-07-2017, 12:21 PM
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Trailer with car. About 800-1200kg. 150 miles maximum
Old 07-07-2017, 02:35 PM
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When MB installed the hitch, what was the maximum towing capacity?
Old 07-08-2017, 01:55 AM
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3.5ton
Old 07-08-2017, 06:32 AM
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How did you know that the trans. overheated?

If you are going by the temp. gauge, then it is probably the the elec. cooling fan in front of the radiator.
Old 07-08-2017, 07:45 AM
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Everything is okay with the cooling fan
Old 07-09-2017, 12:37 AM
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Because the fan is spinning does not mean that everything is OK. It might not be spinning fast enough, especially under a load.
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