C-Class (W204) 2008 - 2014: C180K, C200K, C230, C280, C300, C350, C200CDI, C220CDI, C320CDI

Auto gearbox lumpy when cold

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Old Dec 14, 2021 | 02:57 PM
  #1  
barryhi's Avatar
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C180 W204 1.6 Petrol
Auto gearbox lumpy when cold

Hi all,

2014 W204 - when cold the car changes up through the gears very smooth but when slowing down and therefore changing down its very harsh - its quite a lurch as it changes. As soon as its warmed up (only 4 or 5 miles) then no problem at all and as smooth as expected.

Anybody had similar and found a solution ?

I should add the car has only covered 42000 miles and the gearbox was serviced earlier this year.
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Old Dec 14, 2021 | 09:10 PM
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Odd Piggy's Avatar
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2021 GLB250 FWD, 2023 GLA250 FWD, 2013 C250, 2015 GLK350, 2005 ML350SE, 2003 E320
Not really a solution but it worked:
My 2013 C250 (93,000 miles - 149,000 km) started acting the same way about 30,000 miles ago. It would make a really harsh downshift at the stop at the end of my street. I find that if I let it sit idling for 2 minutes it drives off smoothly and shifts up and down without issue. Worth a try, it’s free.
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Old Dec 15, 2021 | 05:07 AM
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From: Newcastle Upon Tyne
W204 C220CDI 2011
I had that issue on a 5-speed and found the the gearbox was over-filled.
Took out about 300ml and fixed it.
Of course I haD a dip-stick......
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Old Dec 15, 2021 | 07:54 AM
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C180 W204 1.6 Petrol
Thanks for the info. Mine does not have a dipstick for gearbox but I will get it checked where it was serviced just in case.
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