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

Old Jul 7, 2017 | 07:23 AM
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Ákos Fodor's Avatar
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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?
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Old Jul 7, 2017 | 12:21 PM
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Trailer with car. About 800-1200kg. 150 miles maximum
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Old Jul 8, 2017 | 01:55 AM
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3.5ton
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Old Jul 8, 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.
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Old Jul 8, 2017 | 07:45 AM
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Everything is okay with the cooling fan
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Old Jul 9, 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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AC Fan Speed 55 & 500.pdf (14.9 KB, 206 views)
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