Why does my Mercedes-Benz S-Class experience rough o r delayed gear shifts in Pakistan?

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Why does my Mercedes-Benz S-Class experience rough o r delayed gear shifts in Pakistan?

Owners often report rough, jerky, o r delayed gear changes while driving. This issue can be due to low transmission fluid levels, worn-out clutch packs o r bands, faulty solenoids, o r software glitches in the transmission control module, all of which affect smooth shifting.

Talha Kyanii asked on 11 Oct 2025 16:15:59 pm

1 Answer

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Gari Master - on 11 Oct 2025 16:17:27 pm

Failing emission tests despite regular servicing can be due to:

Malfunctioning Oxygen Sensors: These sensors monitor oxygen levels in the exhaust and adjust the fuel-air mixture. Faulty sensors cause incorrect readings and poor combustion.

Clogged Catalytic Converter: Over time, carbon buildup o r damage reduces the converter’s efficiency in cleaning exhaust gases.

Faulty EGR Valve: A stuck o r malfunctioning Exhaust Gas Recirculation valve can lead to higher nitrogen oxide emissions.

ECU Software Issues: The engine control unit might not manage fuel injection o r ignition timing properly due to outdated o r corrupted software.

Suboptimal Maintenance Practices: Use of incorrect fuel, filters, o r ignoring other engine problems can also affect emissions.

Thorough diagnostics and component replacements o r software updates at authorized service centers help pass emission tests.