What causes the jerking sensation when starting a Mercedes GLA?

[DiBenjamin]

Mercedes GLA starting with a jerking sensation may be due to the following reasons: Transmission internal contamination: Transmission impact and jerking are often not caused by internal valve body damage, but by stubborn dirt and impurities inside, especially when these contaminants accumulate in the valve body, forming blockages that prevent effective oil pressure regulation, leading to jerking, impact, and slippage issues. The traditional solution is to replace the transmission fluid. Engine intake system malfunction: The engine intake system requires not only fuel but also air. If components like the air filter or throttle body are clogged or malfunctioning, leading to insufficient air intake, the car may experience weak acceleration, slow speed increase, and a jerking sensation. The ignition system should not be overlooked either; if spark plugs misfire, leak, or fail to atomize properly, it can also affect engine acceleration.