How To Tell The Symptoms Of A Mercedes-Benz Dead Battery

Knowing the symptoms of a car’s dead battery can save you a lot of inconvenience. Once you identify that the battery is dead, you can then proceed to remedy the situation accordingly. These are the symptoms that show that your Mercedes car battery is dead.

Before Starting the Vehicle

When the car battery is dead, these are the symptoms when the car is off:

• Turning on the ignition will not result in anything. The dashboard lights will not come on or flicker.
• Car accessories will not turn on. These include the radio and the cabin lights. If the battery has little power left, you may notice flickering or abnormally dim lights.
• The battery itself might appear damaged or the terminals might be corroded. Cleaning the terminals will not make any difference. Some batteries have an indicator that shows the level of charge and the general health of the battery.
• It will be impossible for you to use the key fob to lock or unlock the car remotely. The car alarm might not function at all.

Symptoms When Driving

Depending on the degree of damage, the car may still be drivable even if the battery is dead. However, you may notice concerning symptoms including:

• Your headlights will flicker when driving at night since they will be powered by the alternator only.
• All the lights including the headlights, tail lights, indicators, and cabin lights will be abnormally dull.
• You may notice your headlights brightening when revving. This is because the alternator produces more power at higher revs.
• The battery warning light will come on as you are driving and will not go off.
• Your battery may show extremely low voltage when checked using a multimeter. This is whether the test is performed when the car is running or not. When the battery voltage is tested when the car is running it should normally read around 13 volts.
• The car might make a grinding noise when you attempt to start it. It will become more difficult to start the more you try.

If you notice any of these problems, it may be a good idea to replace the battery. You can attempt to rehabilitate the battery by cleaning and tightening the terminals or checking the fuses. However, the appearance of two or more of these signs usually means that the battery is not salvageable.

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