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Enigma of Electronics


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Greetings. Lately, I have been experiencing unusual occurrences with my 2007 S211 E320 V6 Cdi.

There is a malfunction with the electrical system. At first, the dash cam I installed began to sporadically activate and deactivate. The connection is permanently installed in the rear cigarette lighter socket. Subsequently, the fan responsible for both the heater and air conditioning sometimes ceases and resumes operation at its own discretion. It is mostly effective. In recent days, I have noticed that the right parking sensor activates and the dashboard sensor lights illuminate while I am driving, even when there are no obstacles around. Do you have any ideas? Thank you in advance.

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What is the age of the battery?

The battery should have a production date.

Have you measured the voltage both under load and without load, as well as during the charging process?

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I have had the motor for around four years. The battery underwent testing during the replacement of the alternator around 6 months ago. I will have the voltages inspected as you have suggested. Thank you.

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While the engine is in operation, the alternator is actively replenishing the battery's charge. The measured voltage corresponds to the output voltage of the alternator, which is regulated by the voltage regulator. This statement alone does not provide significant information on the state of the battery.

The battery should undergo load testing using a specialised tester instrument that is normally exclusive to auto electricians.

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