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    4. : Why does the Mercedes C-Class W204 not turn on after battery replacement?

Why does the Mercedes C-Class W204 not turn on after battery replacement?
Years 2007-2013

Answer

The Mercedes referred to above provides, as a procedure for disconnecting the battery, to turn off the ignition and disconnect the negative pole first and then the positive one. Reverse procedure to reconnect them. If this is not done, damage to the control unit is almost certainly caused, which may not allow the vehicle to start.
Posted on: 16 May 2023 by ScegliAuto

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