Why doesn’t my SLK300 battery stay charged?

A battery that won't hold a charge is almost as good as dead. The battery might be old. Or, you may have been leaving your car doors ajar and the dome lights on during the night. Stop in for a free battery check at your nearest Firestone Complete Auto Care to learn more about the state of your battery.

What happens to my old SLK300 battery?

We’ll recycle your car battery for you!

How much will replacing my Mercedes-Benz SLK300’s battery cost if I get a DieHard battery?

Mercedes-Benz SLK300 batteries can be affordable, especially when there's an available battery coupon. The best part is every DieHard battery comes with a free replacement warranty and extra coverage with DieHard Assurance.

How long is a car battery good for?

You can usually get three to five years out of your car battery. However, battery type, how well you maintain your battery, and your driving habits can all affect your battery’s lifespan.

Why is there white, flaky stuff around my SLK300’s battery post?

The white, flaky stuff that can build up around your SLK300’s battery terminals is known as corrosion. Acid leaking from your vehicle’s battery post can have a chemical reaction with the air, leading to an accumulation of the white, powdery substance over time. Corrosion can affect the flow of electricity between your battery and the electrical system in your SLK300, possibly causing issues with electrical performance and starting. If left unaddressed for long enough, it may even cause your battery to prematurely fail.

How do I clean a corroded SLK300 battery terminal?

Regularly inspect the terminals and clean them with a mixture of baking soda and water, a wire brush, and a rag. Disconnect the battery cables before cleaning to help avoid the risk of electrical shock. Always reference and follow the instructions in your vehicle owner’s manual prior to disconnecting the battery cables.

Where can I purchase SLK300 batteries near me?

Your local Firestone Complete Auto Care sells and installs SLK300 batteries in your neighborhood. Our Firestone Direct mobile vans can even come to you and do it! Learn more about mobile battery services.

Car Batteries for 2009 Mercedes-Benz SLK300

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Mercedes-Benz SLK300 Batteries Near You

Don’t let a dead battery stop you. Shop replacement car batteries for your 2009 Mercedes-Benz SLK300 at Firestone Complete Auto Care.

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Battery Size & Replacement for 2009 Mercedes-Benz SLK300

Researching battery replacements for your Mercedes-Benz SLK300? Use the following chart to find information on Mercedes-Benz SLK300 battery size and cold cranking amps.

Battery	Engine	Warranty		Cold Cranking Amps
48H6	V6/3.0L	Replacement 36 months	Performance months	730
H6-AGM	V6/3.0L	Replacement 36 months	Performance months	760

BATTERIES
V6/3.0L - Battery: 48H6 - Warranty: Replacement 36 months, Performance months - Cold Cranking Amps: 730
V6/3.0L - Battery: H6-AGM - Warranty: Replacement 36 months, Performance months - Cold Cranking Amps: 760

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Buying a Replacement Battery for Mercedes-Benz SLK300

Your SLK300 doesn't have an expiration date, but its battery does. Generally, car batteries last from three to five years. Don’t get stranded by your SLK300’s car battery. Replace it regularly instead! Pay attention to clues that your battery is on its way out. A sluggish engine start, a blinking battery or check engine light, bloated battery case, corrosion-covered posts, and subpar electrical performance can all signal that your battery needs attention.

Plus, at Firestone Complete Auto Care, we’ll test your battery for free. With best-in-class tools we can tell you how much "life" is left in your battery. Visit us for a complimentary battery check and, if needed, a replacement battery for your 2009 Mercedes-Benz SLK300. Automotive batteries are just one of our many areas of expertise. Our expert technicians understand Mercedes-Benz service recommendations for SLK300 battery CCAs and reserve capacity. Get help identifying the type and size of battery that fits your car perfectly, and schedule a weekday or weekend battery replacement service for your car.

Find the Right DieHard Battery for Your SLK300

We know what’s best for your Mercedes-Benz SLK300, which is why we carry just that. Your vehicle needs a reliable, durable and powerful battery in even some of the toughest conditions. DieHard batteries go above and beyond using the latest innovative technology to fuel the expanding power needs of new vehicles and their accessories. Don't call a DieHard battery ordinary. It's an extraordinary battery. Choose a DieHard battery for your Mercedes-Benz SLK300 and drive with confidence knowing that performance will be there when you're counting on it. That’s why you should choose batteries from Firestone Complete Auto Care.

Making Your SLK300’s New Battery Last

Did you recently have a new 2009 Mercedes-Benz SLK300 car battery installed? Great job! Give your new car battery the best start with proper care. You can take care of your battery by decreasing the number of short trips you take, cleaning your battery posts, and not using electronics such as the radio and power outlets when the engine is off.

Commonly Asked SLK300 Battery Questions

Get answers to common car battery questions, from Firestone Complete Auto Care. If you have battery questions that are Mercedes-Benz SLK300-specific, stop by your nearest store. Our technicians have the answers.

Why doesn’t my SLK300 battery stay charged? A battery that won't hold a charge is almost as good as dead. The battery might be old. Or, you may have been leaving your car doors ajar and the dome lights on during the night. Stop in for a free battery check at your nearest Firestone Complete Auto Care to learn more about the state of your battery.
What happens to my old SLK300 battery? We’ll recycle your car battery for you!
How much will replacing my Mercedes-Benz SLK300’s battery cost if I get a DieHard battery? Mercedes-Benz SLK300 batteries can be affordable, especially when there's an available battery coupon. The best part is every DieHard battery comes with a free replacement warranty and extra coverage with DieHard Assurance.
How long is a car battery good for? You can usually get three to five years out of your car battery. However, battery type, how well you maintain your battery, and your driving habits can all affect your battery’s lifespan.
Why is there white, flaky stuff around my SLK300’s battery post? The white, flaky stuff that can build up around your SLK300’s battery terminals is known as corrosion. Acid leaking from your vehicle’s battery post can have a chemical reaction with the air, leading to an accumulation of the white, powdery substance over time. Corrosion can affect the flow of electricity between your battery and the electrical system in your SLK300, possibly causing issues with electrical performance and starting. If left unaddressed for long enough, it may even cause your battery to prematurely fail.
How do I clean a corroded SLK300 battery terminal? Regularly inspect the terminals and clean them with a mixture of baking soda and water, a wire brush, and a rag. Disconnect the battery cables before cleaning to help avoid the risk of electrical shock. Always reference and follow the instructions in your vehicle owner’s manual prior to disconnecting the battery cables.
Where can I purchase SLK300 batteries near me? Your local Firestone Complete Auto Care sells and installs SLK300 batteries in your neighborhood. Our Firestone Direct mobile vans can even come to you and do it! Learn more about mobile battery services.