Why doesn’t my SL450 battery stay charged?

A battery is in its final hour when it will no longer hold a charge. The battery might be old. Or, you may have a habit of leaving your car doors open and the dome lights on during the night. Stop by for a complimentary battery check at your local Firestone Complete Auto Care and get a handle on your car battery’s health.

What happens to my old SL450 battery?

We recycle it! Nearly 100% of all lead-acid batteries are recyclable.

How much do DieHard batteries cost for your Mercedes-Benz SL450?

Get affordable prices on Mercedes-Benz SL450 batteries by using one of our limited-time battery deals. Plus, all DieHard car batteries come with a free replacement warranty and extra coverage with DieHard Assurance.

How often should I replace my car battery?

A car battery normally lasts three to five years, but this number can vary based on battery type, your driving habits, and battery maintenance.

What is the white, crusty stuff around my SL450’s battery post?

If you notice white, crusty stuff around the battery terminals of your SL450, it's likely corrosion. A chemical reaction between battery acid and the air can create a white, powdery substance that builds up over time on the terminals. This buildup can interfere with the electrical connection between the battery and your SL450’s electrical system, potentially leading to poor performance, difficulty starting, and other issues.

How do I clean a corroded SL450 battery terminal?

Regularly inspecting and cleaning your battery terminals will help keep your SL450’s electrical system running smoothly. Before cleaning, reference your owner’s manual for instructions on how to disconnect the battery cables. Once the cables have been disconnected, gently clean the terminals with a mixture of water and baking soda, a wire brush, and a rag.

Who carries SL450 batteries near me?

You can shop for SL450 batteries at your local Firestone Complete Auto Care, and our expert technicians will even handle the installation. Don’t have time to visit our store? Our Firestone Direct mobile vans can come to you for battery installations! Learn more about our mobile battery services.

2020 Mercedes-Benz SL450 Batteries

Get a New Mercedes-Benz Battery

Get a New Mercedes-Benz SL450 Battery

The middle of nowhere is the wrong place to have a weak battery. Shop replacement batteries for 2020 Mercedes-Benz SL450 today and schedule a quick installation at Firestone Complete Auto Care.

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Battery Size & Replacement for 2020 Mercedes-Benz SL450

Need more info about Mercedes-Benz SL450 batteries? Check the chart to find the right car battery size and cold cranking amps for your SL450.

Battery	Engine	Warranty		Cold Cranking Amps
H8-AGM	V6/3.0L	Replacement 36 months	Performance months	900

BATTERIES
V6/3.0L - Battery: H8-AGM - Warranty: Replacement 36 months, Performance months - Cold Cranking Amps: 900

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Buy the Right Battery for Your Mercedes-Benz SL450

You can pretty much drive your Mercedes-Benz SL450 until you don't want to anymore. But your SL450's battery? Don't count on it to last forever. Generally, car batteries last from three to five years. You want to replace your 2020 Mercedes-Benz SL450 battery before it fails and leaves you stranded. Pay attention to clues that your battery is on its way out. A lagging starter, an illuminated battery or check engine light, bloated battery case, corrosion-covered posts, or faded headlights may all indicate that your battery is on its last leg.

Plus, at Firestone Complete Auto Care, we’ll test your battery for free. With computerized testing we can see how much charge is left in your battery. Visit us for a complimentary battery check and, if necessary, a battery replacement to help keep your 2020 Mercedes-Benz SL450 running! Car batteries are one of our many specialties! Our expert technicians understand Mercedes-Benz service recommendations for SL450 battery CCAs and reserve capacity. Get help choosing the battery size that fits your car perfectly, and schedule a fast car battery replacement at your earliest convenience.

Is There a DieHard Battery for SL450s?

We know what’s best for your Mercedes-Benz SL450, which is why we exclusively carry the best. Your vehicle needs a reliable, durable and powerful battery in even some of the toughest conditions. DieHard SL450 batteries surpass expectations using the latest innovative technology to meet the expanding power requirements 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 SL450 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 SL450’s New Battery Last

Got a new car battery installed in your 2020 Mercedes-Benz SL450? Great job! Now, help it last longer and stay charged by caring for it from the get-go. Give your new battery a hand by decreasing the number of short trips you take, keeping your battery posts clean, and not playing the radio or using other electronics when the engine is turned off.

Answers to Your SL450 Car Battery Questions

Turn to Firestone Complete Auto Care for answers to all your car battery questions. If you have battery questions that are Mercedes-Benz SL450-specific, visit your nearest store. Our technicians are happy to help.

Why doesn’t my SL450 battery stay charged? A battery is in its final hour when it will no longer hold a charge. The battery might be old. Or, you may have a habit of leaving your car doors open and the dome lights on during the night. Stop by for a complimentary battery check at your local Firestone Complete Auto Care and get a handle on your car battery’s health.
What happens to my old SL450 battery? We recycle it! Nearly 100% of all lead-acid batteries are recyclable.
How much do DieHard batteries cost for your Mercedes-Benz SL450? Get affordable prices on Mercedes-Benz SL450 batteries by using one of our limited-time battery deals. Plus, all DieHard car batteries come with a free replacement warranty and extra coverage with DieHard Assurance.
How often should I replace my car battery? A car battery normally lasts three to five years, but this number can vary based on battery type, your driving habits, and battery maintenance.
What is the white, crusty stuff around my SL450’s battery post? If you notice white, crusty stuff around the battery terminals of your SL450, it's likely corrosion. A chemical reaction between battery acid and the air can create a white, powdery substance that builds up over time on the terminals. This buildup can interfere with the electrical connection between the battery and your SL450’s electrical system, potentially leading to poor performance, difficulty starting, and other issues.
How do I clean a corroded SL450 battery terminal? Regularly inspecting and cleaning your battery terminals will help keep your SL450’s electrical system running smoothly. Before cleaning, reference your owner’s manual for instructions on how to disconnect the battery cables. Once the cables have been disconnected, gently clean the terminals with a mixture of water and baking soda, a wire brush, and a rag.
Who carries SL450 batteries near me? You can shop for SL450 batteries at your local Firestone Complete Auto Care, and our expert technicians will even handle the installation. Don’t have time to visit our store? Our Firestone Direct mobile vans can come to you for battery installations! Learn more about our mobile battery services.