Why won't my S420 battery stay charged?

A battery that won't hold a charge is almost as good as dead. The battery might be old. Or, you’ve been leaving the doors slightly open and the cabin light at night. Stop in for a free battery check at your local Firestone Complete Auto Care and learn more about your battery's charge.

What do you do with my old S420 battery?

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

How much will replacing my Mercedes-Benz S420’s battery cost if I get a DieHard battery?

Get affordable prices on Mercedes-Benz S420 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 long can I expect my car battery to last?

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?

The white, crusty stuff that can accumulate around S420 car battery terminals is called corrosion. It is caused by a chemical reaction between the battery acid and the air, which creates a white, powdery substance that can build up on the terminals over time. Corrosion can interfere with the flow of electricity between the battery post and the car's electrical system, sometimes leading to poor electrical performance, difficulty starting, and even premature battery failure.

What do I do about corrosion on my S420 car battery?

You can help prevent or get rid of corrosion by regularly inspecting and cleaning your battery terminals. Before cleaning your battery, see your S420 owner's manual to learn how to disconnect the battery cables. After disconnecting the cables, use a mixture of water and baking soda, a wire brush, and a rag to carefully clean the terminals.

Where can I find a battery for my S420?

At Firestone Complete Auto Care, we make it easy to get a new car battery. Our stores sell and install S420 batteries, and our Firestone Direct mobile vans can even come to you for added convenience. Check out our mobile battery services to learn more.

1997 Mercedes-Benz S420 Batteries

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Get a Battery for Your Mercedes-Benz S420

Don't let a failing battery slow you down. Shop replacement batteries for 1997 Mercedes-Benz S420s today and schedule a quick installation at Firestone Complete Auto Care.

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Battery Size & Replacement for 1997 Mercedes-Benz S420

Researching battery replacements for your Mercedes-Benz S420? Use the following chart to find information on Mercedes-Benz S420 battery size and cold cranking amps.

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

You can pretty much drive your Mercedes-Benz S420 until you don't want to anymore. But your S420's battery? Don't count on it to last forever. On average, auto batteries last anywhere from three to five years. You want to replace your 1997 Mercedes-Benz S420 battery before it fails and leaves you stranded. Watch for signs that your current battery is getting too old or too weak. A lagging starter, an illuminated battery or check engine light, swollen battery case, corroded battery posts, or dim headlights may all indicate 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. Stop by for a free battery test and, if necessary, a battery replacement to help keep your 1997 Mercedes-Benz S420 running! Automotive batteries are just one of our many areas of expertise. Our expert technicians understand Mercedes-Benz service recommendations for S420 car batteries’ reserve capacities and cold cranking amps. Get help choosing the battery size that fits your car perfectly, and schedule an appointment today for a quick car battery replacement.

Firestone Has DieHard Batteries for S420s

Your Mercedes-Benz S420 deserves the best, which is why we only carry top-of-the-line replacement parts and batteries. You need a reliable, durable and powerful battery in even some of the toughest conditions. DieHard batteries shatter expectations using the latest innovative technology to meet the increasing power demands of new vehicles. A DieHard battery isn't an ordinary car battery. It's extraordinary. Choose a DieHard battery for your Mercedes-Benz S420 and get behind the wheel with confidence. Why? Because your battery will perform when you need it. That's the kind of battery we deliver.

After Buying 1997 Mercedes-Benz S420 Battery

Got a new car battery installed in your 1997 Mercedes-Benz S420? Great job! Now, help it last longer and stay charged by caring for it from the get-go. You can take care of your battery by cutting back on unnecessary short trips, 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 have the answers.

Why won't my S420 battery stay charged? A battery that won't hold a charge is almost as good as dead. The battery might be old. Or, you’ve been leaving the doors slightly open and the cabin light at night. Stop in for a free battery check at your local Firestone Complete Auto Care and learn more about your battery's charge.
What do you do with my old S420 battery? We recycle it! Nearly 100% of all lead-acid batteries are recyclable.
How much will replacing my Mercedes-Benz S420’s battery cost if I get a DieHard battery? Get affordable prices on Mercedes-Benz S420 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 long can I expect my car battery to last? 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? The white, crusty stuff that can accumulate around S420 car battery terminals is called corrosion. It is caused by a chemical reaction between the battery acid and the air, which creates a white, powdery substance that can build up on the terminals over time. Corrosion can interfere with the flow of electricity between the battery post and the car's electrical system, sometimes leading to poor electrical performance, difficulty starting, and even premature battery failure.
What do I do about corrosion on my S420 car battery? You can help prevent or get rid of corrosion by regularly inspecting and cleaning your battery terminals. Before cleaning your battery, see your S420 owner's manual to learn how to disconnect the battery cables. After disconnecting the cables, use a mixture of water and baking soda, a wire brush, and a rag to carefully clean the terminals.
Where can I find a battery for my S420? At Firestone Complete Auto Care, we make it easy to get a new car battery. Our stores sell and install S420 batteries, and our Firestone Direct mobile vans can even come to you for added convenience. Check out our mobile battery services to learn more.