UniEnergy Technologies Battery » Mercedes C300 Battery Replacement Cost (Types & Replacement Guide)

Mercedes C300 Battery Replacement Cost (Types & Replacement Guide)

Are you due for a Mercedes Benz C300 Battery Replacement Service?

You are probably wondering how much it will cost you, right? Sure, car batteries last for several years. But due to a variety of reasons, they can fail or die. When this happens, you will need battery replacement.

However, the battery replacement costs vary depending on several factors, including location, vehicle model, repair, and maintenance required.

If you want to learn everything about Mercedes Benz battery replacement costs, you have stopped at the right page.

Here, we will break down the battery replacement cost of the Mercedes C300 and highlight the signs and symptoms of a faulty battery. We will also answer other questions you might have about battery replacement.

How Much Does It Cost to Replace Mercedes Benz C300 Battery?

How Much Does It Cost to Replace Mercedes Benz C300 Battery?
Image Credit: mbusa

Before replacing your C300 battery, ask yourself the following questions:

  • What engine does my Mercedes-Benz C300 have?
  • What battery size do I need for my vehicle?
  • Will I replace the battery myself or seek professional help?

Answering these questions will help you pinpoint the exact cost of replacing your car’s battery.

That said, expect to pay anywhere between $90 to $200 for a new high-performance battery. As for the replacement, you can do it yourself to save between $100 to $200.

But remember, car batteries in most Mercedes Benz are not accessible. That’s because the manufacturer opted to shrink the hood space to increase the performance of these vehicles.

As a result, you might need to hire a technician to locate the battery and help you replace it. That means you will need to spend around $140 on labor costs.

Besides, the average cost of battery replacement might vary depending on the model year of your Mercedes, battery size, and location. Fortunately, most car part dealers can replace the battery at no cost if you buy the Mercedes C300 battery from them.

You can also save on the replacement cost if you select aftermarket batteries over premium OEM batteries.  Even though these batteries come at affordable prices, ensure your selection meets the OEM specifications.

What Type of Battery Does A Mercedes Benz C300 Use?

The new battery needs to match the group size of the old or dead battery. Most newer models from the automaker come equipped with AGM H8 or Group 49 batteries. These batteries output over 700 cold cranking amps and deliver around 140m of reserve power.

But the best batteries for Mercedes are absorbent glass mat (AGM) batteries. Unlike traditional lead-acid batteries, AGM batteries produce more power at a moment, which is ideal for running modern cars and their electronic components.

In addition, they are maintenance-free since they are sealed. Other advantages of AGM batteries include resistance to corrosion buildup and the ability to start even when it’s cold.

Below is a list of the best car batteries for Mercedes Benz:

  • Bosch batteries
  • Exide Edge AGM batteries
  • AC Delco Batteries
  • Optima
  • EverStart, AutoCraft, and DuraLast Batteries
  • Odyssey batteries

Apart from that, there are several factors to consider when looking for a Mercedes battery for your Mercedes C300, including:

  • Vibration Resistance
  • Warranty Period
  • Spill Proof and Maintenance Free

How To Replace Mercedes Benz C300 Battery

How To Replace Mercedes Benz C300 Battery
Image Credit: motor1

Whether you replace the battery yourself or hire a Mercedes-Benz mechanic, here are the steps to follow:

1. Locate the battery

Some Mercedes Benz vehicles have unique battery locations, like beneath the rear side, on the passenger side, or beneath the floorboard. Therefore, it’s crucial to go through your car’s manual for detailed information on the battery’s location.

2. Disconnect the terminals

Once you have located the battery, use a wrench to loosen the 10mm bolt holding the negative battery terminal in place. Twist and pull the terminal without using much force. Repeat the same process for the positive battery terminal.

You might have to insulate the positive terminal with electrical tape to prevent it from contacting any part of your vehicle.

Don’t forget to inspect the cable ends and wiring for signs of corrosion. If there’s any, get rid of the build-up. In case of severe corrosion, you might need to replace or repair the cables.

3. Remove the battery

Find the bracket holding the battery in place. Remove the fastening bolt on the clamp using a wrench to free the battery. After that, remove the battery carefully since it might be heavy.

4. Clean the battery tray

If the battery tray has excessive corrosion build-up, clean it with a wire brush before installing a new battery.

5. Install a New Battery

After removing the old battery, place the new battery in the tray and put back the battery bracket. Next, reconnect the positive cable and negative cable. You might need to apply an anti-corrosion to the terminal and battery cable.

6. Synchronization

Like BMW and Audi, you will need to synchronize the automatic functions with the new battery, such as opening windows and sunroof. Don’t forget to calibrate the steering wheel.

Signs Of A Faulty Battery

Signs Of A Faulty Battery
Image Credit: motortrend

It’s crucial to get your battery tested every 3-5 years for voltage changes to ensure it’s functioning at optimal levels. Always keep an eye out for key signs pointing to a faulty battery, like….

1. The vehicle takes a while to start

If your car battery is faulty; it means it will take longer to receive a charge from the alternator. As a result, the engine will delay turning over. So, if you have trouble starting the ignition, it’s time for a service visit. Besides the dead battery, starter problems can prevent a vehicle from cranking up.

2. Dashboard lights (dash lights)

Monitor the battery light or check the engine light on the dashboard. If the warning light illuminates suddenly, it’s a sign of a low battery fluid level or a failing battery.

3. Electrical malfunctions

A weakening battery might cause the vehicle’s electrical accessories to go haywire. This happens because the battery doesn’t supply enough juice to accessories. Because of this, the power window, headlight, air conditioner, door locks, and other electronics might become unresponsive.

4. Poor performance in cold weather

Climate can influence the battery performance, more specifically, cold climate. Extremely low temperatures can cause the fluids in the cells to freeze, leading to battery failure.

5. Strange smell

If you notice an odd smell, more like rotten eggs, it means the battery acid is leaking. You need to visit your local dealership or service center and get the battery replaced. Otherwise, the fluid leaks will cause corrosion or damage to other components of the engine.

6. Swollen Battery

A battery with bulging sections is extremely dangerous. So, if you open the hood and see a swelling battery, get your car towed to the auto shop immediately. Swelling usually happens when the alternator overcharges the battery.

How Long Does A Mercedes C300 Battery Last?

A Mercedes C300 battery can last for long periods of times-anywhere between 6 to 8 years. Some genuine OEM Mercedes Benz batteries can even last for 10 years. However, the battery’s life can vary from one vehicle to another depending on several factors. They include:

1. Climate

Abnormally hot and cold weather conditions can affect the vehicle’s battery life. Cold temperatures slow down chemical activities in the battery, affecting how it releases power. In hot temperatures, the liquid electrolyte can evaporate, causing sulfation.

2. Driving habits

Starting the engine and turning it off frequently can cause the battery to drain completely. Also, leaving sound systems and other electronic components on can make the battery work more than normal.

3. Moisture and Corrosion

Moisture in the engine bay can lead to corrosion formation on electrical connectors and battery posts. Corrosion can cause electric shorts and added resistance, which drains the battery quickly. That explains why it is crucial to get your vehicle inspected by  Mercedes-Benz factory mechanics.

4. Bad charging system

A faulty electrical charging system can drain the battery when you’re driving. For instance, a damaged alternator can fail to output enough amp voltage. Therefore, the battery will run out of juice faster. The situation will even worsen if you left the radio or lights on.

5. Electrical problems

Frayed electrical wires or loose ground straps can increase the rate at which a battery discharges. But you can avoid this by conducting regular check-ups to ensure the battery is in an excellent state.

6. Dirt and Grease

Besides corrosion, dirt and grease buildup can drain the battery and even reduce the flow of current from the alternator, leading to a faulty battery.

Bottom Line

Unlike diamonds, car batteries can’t last forever. An average Mercedes C300 battery lasts for about 6 to 8 years. But some premium OEM batteries can go for up to 10 years. Even so, you will need to replace your car battery at some point.

The average replacement cost of a Mercedes Benz battery can range from $200 to $400. This cost covers the battery price and labor. But you can save on the costs by getting an aftermarket battery and replacing the old battery yourself.

Ensure that you regularly check your battery for signs and symptoms of damage. Also, take the steps necessary to prevent common car battery issues and boost the battery’s life.

Do you have any questions about the Mercedes Benz battery replacement cost? Tell us below in the comment section.

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