How Often to Replace a Car Battery

Male mechanic changing car battery

How long does a Mercedes-Benz battery last? Most experts agree that you should have your Mercedes-Benz battery replacement done every 4-5 years. However, there are circumstances that can alter that timeline. Learn more about what can impact the lifespan of a car battery, signs you’re going to need a Mercedes-Benz battery replacement, and the Mercedes-Benz battery cost with the experienced service technicians at Mercedes-Benz of Louisville.

How to Know When a Mercedes-Benz Battery Replacement Is Needed

Wondering when to replace the car battery? There are a few signs you can keep an eye out for that point to your battery reaching the end of its life, such as:

  • Dimming headlights
  • Unusual power fluctuations
  • More frequent need for engine revving or jump-starts
  • Takes longer to start the engine when you turn the key/push the button
  • Slow engine crank
  • Illuminated check engine light
  • A swollen, misshaped battery case
  • Battery fluid leak

Common Causes for Mercedes-Benz Battery Deterioration

We’ve answered, how long does a Mercedes-Benz battery last, and now you’re probably wondering if a Mercedes-Benz battery replacement is needed? Below are signs it’s time to replace the Mercedes-Benz battery:

  • Climate: If you live in a hot climate, temperatures can cause the evaporation of liquids inside a car battery, which means your battery life will be inevitably shorter. When the templates start getting colder, your battery needs to work harder to generate energy to keep your vehicle running smoothly. Colder weather also results in thicker engine oil that also puts a strain on your battery.
  • Driving Habits: If you do a lot of short trips like your commute to work or to the grocery your, your battery doesn’t have enough running time to fully recharge in between stops. If your vehicle spends most of its time sitting in the garage or on your driveway for long periods of time, the battery drains passively – even if the engine isn’t on.
  • Time: A Mercedes-Benz battery can only go through so many charge cycles, so the death of your car battery is unavoidable, but proper care can prevent the battery from dying on you early.
  • Vibrations: If you drive over rough roads frequently, vibrations can cause your battery’s hold-down clamps to loosen or your internal battery parts to break down faster.
  • Needing a Jump: If your battery is repeatedly drained and requires jumping, this can shorten battery life significantly.

When it’s time for a Mercedes-Benz battery replacement, schedule your service appointment right at home!

How to Test Your Mercedes-Benz Battery at Home

While we can test your Mercedes-Benz battery during your next service appointment, you can also test it at home to see if a Mercedes-Benz battery replacement is needed:

Digital Multimeter Test:

  1. Set the voltmeter to 20 DC volts.
  2. Under the hood, touch the negative terminal (black) with the negative meter probe (also black).
  3. Touch the positive terminal (red) with the positive meter probe (also red).
  4. Have a friend turn on the headlights and check the voltmeter reading.
  5. At 80 °F, a reading of 12.5 volts or higher means your battery is fully charged. 12.3 volts means it’s at about 75% charged. 11.8 volts or lower means you have a 25% or less charge.

Headlight Test: 

  1. Start your vehicle, but keep it in park, and make sure the headlights are on.
  2. Rev the engine and see if the headlight brightness changes.
  3. If the headlights get brighter, that means the current is not strong enough to keep the lights at normal brightness while the car is idling.
  4. Take your car to our Louisville service center for further assessment.

How Much Does a Mercedes-Benz Battery Cost?

Car batteries range between $75 and $120 for most vehicles. If you have a premium battery, costs could exceed $200. Hybrid car batteries have a much bigger job, which means they’re much more expensive and can cost anywhere between $1,000 and $6,000. While this may seem extreme, their pricier batteries are offset by lower fuel consumption.

Maintain Your Mercedes-Benz Vehicle at Mercedes-Benz of Louisville

Now that you know when about the Mercedes-Benz battery cost and when a Mercedes-Benz battery replacement is needed, you can schedule a service appointment right at home. Feel free to stop by for Express Service, no appointment is needed. If you want to replace your Mercedes-Benz battery yourself, you can visit our parts center or order a replacement online. We can also answer your service-related questions like how long does a Mercedes-Benz battery last, how to make your tires last longer, or how to check the brake fluid.

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