Mercedes E-Class Engine Light — Multiple Codes After Battery
Multiple warning lights and stored fault codes appearing after battery disconnection or replacement on W212 E-Class are caused by the car losing learned adaptations for the throttle, gearbox and other systems. These resolve after a short drive as the systems relearn. Persistent codes after 50+ miles indicate genuine faults.
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No commonly reported misdiagnoses for this fault yet. If you have replaced a part that did not fix this Mercedes-Benz E-Class 2009 problem, submit a wrong diagnosis report — it helps other drivers avoid the same costly mistake.
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