Why doesn’t my S420 battery stay charged?

A battery that won't hold a charge is almost as good as dead. The battery may be too old. Or, you may have been leaving your car doors ajar and the cabin light at night. Stop by for a complimentary battery check at your nearest Firestone Complete Auto Care and get a handle on your car battery’s health.

What happens to my old S420 battery?

We’ll recycle your car battery for you!

What’s the cost of DieHard batteries for Mercedes-Benz S420s?

You can find affordable S420 batteries by using one of our car battery coupons, when available. Plus, every DieHard battery comes with extra coverage thanks to DieHard Assurance and a free replacement warranty.

How long is a car battery good for?

Car battery lifespan varies depending on a few factors, including driving conditions, accessories, how well it’s maintained, and the type of battery. On average, a car battery lasts about three to five years.

What is the white, crusty substance accumulating on my S420’s battery post?

If you notice white, crusty stuff around the battery terminals of your S420, 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 S420’s electrical system, potentially leading to poor performance, difficulty starting, and other issues.

How do I clean corrosion off my S420 vehicle battery?

Regularly inspecting and cleaning your battery terminals will help keep your S420’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 sells S420 batteries near me?

Your local Firestone Complete Auto Care sells and installs S420 batteries in your neighborhood. Our Firestone Direct mobile vans can even come to you and do it! Learn more about mobile battery services.

1996 Mercedes-Benz S420 Car Batteries

Get a New Mercedes-Benz Battery

Get a Battery for Your Mercedes-Benz S420

Don’t let a dead battery stop you. Shop replacement car batteries for your 1996 Mercedes-Benz S420 at Firestone Complete Auto Care.

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Battery Size & Replacement for 1996 Mercedes-Benz S420

Not sure what battery to get for your Mercedes-Benz S420? Check the chart to find the right car battery size and cold cranking amps for your S420.

Battery	Engine	Warranty		Cold Cranking Amps
H8-AGM	V8/4.2L	Replacement 36 months	Performance months	900

BATTERIES
V8/4.2L - Battery: H8-AGM - Warranty: Replacement 36 months, Performance months - Cold Cranking Amps: 900

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Shopping for Mercedes-Benz S420 Car Batteries

Sadly, your Mercedes-Benz S420 won't last forever. Neither will its battery. Generally, car batteries last from three to five years. Don’t get stranded by your S420’s car battery. Replace it regularly instead! Pay attention to clues that your battery is on its way out. A slow engine crank, a blinking battery or check engine light, bloated battery case, corroded battery posts, and subpar electrical performance can all be signs that your battery is on its last leg.

You can also get a Free Battery Test at your local Firestone Complete Auto Care. With best-in-class tools we can tell you how much "life" is left in your battery. Stop by for a free battery test and, if needed, get your Mercedes-Benz S420 a replacement battery. Car batteries are only one of our many strong suits. Our expert technicians understand Mercedes-Benz service recommendations for S420 battery CCAs and reserve capacity. Get help figuring out the battery size that fits your car perfectly, and schedule a fast car battery replacement at your earliest convenience.

Why Choose a DieHard Battery for Your S420?

We know what’s best for your Mercedes-Benz S420, which is why we carry just that. You need a reliable, durable and powerful battery in even some of the toughest conditions. DieHard batteries shatter expectations and house the latest technology to fuel the expanding power requirements of new vehicles and their accessories. Don't call a DieHard battery ordinary. It's an extraordinary battery. Buy a DieHard battery for your Mercedes-Benz S420 and drive with confidence knowing that performance will be there when you need it most. That’s why you should choose batteries from Firestone Complete Auto Care.

Caring for a New Mercedes-Benz S420 Battery

Got a new car battery installed in your 1996 Mercedes-Benz S420? Good thinking! You can give your new battery a head start with proper care and attention. ensuring all the lights are turned off before you leave the car, decreasing the number of short trips you take, keeping the battery posts corrosion-free, and not using electronics such as the radio and power outlets when the engine is off.

Answers to Your S420 Car Battery Questions

Get answers to common car battery questions, from Firestone Complete Auto Care. If you have a battery question that's unique to your Mercedes-Benz S420 battery, pay us a visit. Our technicians are happy to help.

Why doesn’t my S420 battery stay charged? A battery that won't hold a charge is almost as good as dead. The battery may be too old. Or, you may have been leaving your car doors ajar and the cabin light at night. Stop by for a complimentary battery check at your nearest Firestone Complete Auto Care and get a handle on your car battery’s health.
What happens to my old S420 battery? We’ll recycle your car battery for you!
What’s the cost of DieHard batteries for Mercedes-Benz S420s? You can find affordable S420 batteries by using one of our car battery coupons, when available. Plus, every DieHard battery comes with extra coverage thanks to DieHard Assurance and a free replacement warranty.
How long is a car battery good for? Car battery lifespan varies depending on a few factors, including driving conditions, accessories, how well it’s maintained, and the type of battery. On average, a car battery lasts about three to five years.
What is the white, crusty substance accumulating on my S420’s battery post? If you notice white, crusty stuff around the battery terminals of your S420, 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 S420’s electrical system, potentially leading to poor performance, difficulty starting, and other issues.
How do I clean corrosion off my S420 vehicle battery? Regularly inspecting and cleaning your battery terminals will help keep your S420’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 sells S420 batteries near me? Your local Firestone Complete Auto Care sells and installs S420 batteries in your neighborhood. Our Firestone Direct mobile vans can even come to you and do it! Learn more about mobile battery services.