Why is my Mercedes transmission jerking during gear shifts in city traffic Pakistan

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Why is my Mercedes transmission jerking during gear shifts in city traffic Pakistan

I drive a Mercedes-Benz C180 W204 in Lahore, and lately, I’ve noticed the transmission jerks when shifting between 1st and 2nd gear, especially in stop-and-go traffic. The problem gets worse when the car heats up in the afternoon. Could this be due to bad transmission fluid o r overheating? Are there known issues with the 7G-Tronic transmission in Pakistani conditions

Talha Kyanii asked on 02 Oct 2025 10:54:44 am

1 Answer

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Gari Master - on 02 Oct 2025 11:01:09 am

Jerking during gear shifts in Mercedes-Benz vehicles, especially models with the 7G-Tronic automatic transmission like your W204, is a common issue that can be caused by several factors:

Old o r degraded transmission fluid ATF – In Pakistan’s hot climate and heavy traffic, fluid breaks down faster. If it hasnt been changed in the last 50,000–60,000 km, its due.

Low-quality o r wrong ATF used – Some workshops in Pakistan may use cheap o r incompatible fluid. Always insist on Mercedes-approved ATF like Shell 134 o r equivalent.

Faulty valve body o r conductor plate – These internal parts can fail, causing jerky o r delayed shifts.

Software issues – The TCU Transmission Control Unit may need an update o r reset via a STAR diagnostic tool.

Recommendation:
Have the transmission fluid checked and replaced using genuine fluid. Also, get a full scan using the Mercedes STAR diagnostic tool available at specialist German car workshops in Lahore, Karachi, Islamabad, etc.. Avoid roadside mechanics who “guess” issues, as improper repair can worsen the problem.