ml 270 cdi not upshifting until 2500-3000 rpm when warmed

tsu

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May 26, 2021
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Your Mercedes
ml270 2001
Hello to everyone,
I have an ml 270 cdi 2001 . A few weeks ago and i started noticing that after about 100 kilometers of driving it starts to not shift up until at least 2500 revs .If i let it cool down for an hour it will be shifting normally again. When it doesnt shift up until 2500 rpm its also very aggresive on the downshift making the whole car jolt when decelerating. Once a week it will also throw itself into neutral randomly while decelerating. All that has changed within 2 months is swirl flap delete and turbo vacuum actuator. Does anyone have any experience on this matter? Any suggestions would be appreciated.
 

Blobcat

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Grange Moor
Your Mercedes
R171 SLK280, Smart R451, Land Rover 110 County SW, 997 C2S, R1250 GSA TE 40th, CBR600FP
When did you last have the atf changed?
 

Taffy7hfa

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Your Mercedes
2002 ML 270 CDI,2016 Hyundai1.6 CRDI i30,2014 Peugeot 308 HDI. .6 HDI.
Definitely worth checking the atf level before you do anything else, then check the TCU for fault codes.
it sounds like there will be some.
 

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