Why won't my 420SEL battery stay charged?

A car battery that needs to be jump-started every time is as good as dead. The battery may be too old. Or, you may have a habit of leaving your car doors open and the cabin light at night. Stop by for a free battery test at your nearest Firestone Complete Auto Care and get a handle on your car battery’s health.

What happens to my old 420SEL battery?

We recycle it, taking care of both your car and the Earth.

What’s the cost of DieHard batteries for Mercedes-Benz 420SELs?

Get affordable prices on Mercedes-Benz 420SEL 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.

Why is there white, crusty buildup on my 420SEL’s battery post?

If you notice white, crusty stuff around the battery terminals of your 420SEL, 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 420SEL’s electrical system, potentially leading to poor performance, difficulty starting, and other issues.

How do I clean a corroded 420SEL battery terminal?

You can help prevent or get rid of corrosion by regularly inspecting and cleaning your battery terminals. Before cleaning your battery, see your 420SEL 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.

Who sells 420SEL batteries near me?

When you need a new battery for your vehicle, Firestone Complete Auto Care is here to help. We sell and install 420SEL batteries at our stores nationwide — and our Firestone Direct mobile vans can provide convenient on-site battery services. Learn more about our mobile battery services and book an appointment.

1989 Mercedes-Benz 420SEL Batteries

Get a New Mercedes-Benz Battery

Get a New Mercedes-Benz 420SEL Battery

Don’t let a dead battery stop you. Shop replacement car batteries for your 1989 Mercedes-Benz 420SEL at Firestone Complete Auto Care.

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The Right Battery Size for a 1989 Mercedes-Benz 420SEL

Not sure what battery to get for your Mercedes-Benz 420SEL? Use this chart to find the right battery size and CCAs for your Mercedes-Benz 420SEL.

Battery	Engine	Warranty		Cold Cranking Amps
93-1	V8/4.2L	Replacement 24 months	Performance months	825
49H8	V8/4.2L	Replacement 36 months	Performance months	900
H8-AGM	V8/4.2L	Replacement 36 months	Performance months	900

BATTERIES
V8/4.2L - Battery: 93-1 - Warranty: Replacement 24 months, Performance months - Cold Cranking Amps: 825
V8/4.2L - Battery: 49H8 - Warranty: Replacement 36 months, Performance months - Cold Cranking Amps: 900
V8/4.2L - 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 420SEL

Sadly, your Mercedes-Benz 420SEL won't last forever. Neither will its battery. Generally, car batteries last from three to five years. Don’t get stranded by your 420SEL’s car battery. Replace it regularly instead! Look out for symptoms of a faulty car battery. A sluggish engine start, an illuminated check engine light or battery signal, bloated battery case, corroded battery posts, or weak lights can all signal that your battery is waving goodbye.

Or, you can get a complimentary battery check at your nearest 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, a replacement battery for your 1989 Mercedes-Benz 420SEL. Automotive batteries are just one of our many areas of expertise. Our technicians are familiar with Mercedes-Benz-specific recommendations for 420SEL battery CCAs and reserve capacity. Get help choosing the battery size that's best for your 420SEL, and schedule an appointment today for a quick car battery replacement.

Is There a DieHard Battery for 420SELs?

Your Mercedes-Benz 420SEL deserves the best, 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 batteries shatter expectations and house the latest technology to satisfy the expanding power needs of new vehicles. A DieHard battery isn't an ordinary car battery. It's extraordinary. Buy a DieHard battery for your Mercedes-Benz 420SEL and drive with confidence knowing that performance will be there when you need it most. That's the kind of battery we deliver.

After Buying 1989 Mercedes-Benz 420SEL Battery

Have you recently had a fresh battery installed in your Mercedes-Benz 420SEL? Great job! Give your new car battery the best start with proper care. Give your new battery a hand by limiting short trips, keeping your battery posts clean, and avoiding radio and electronic component use when the engine is off.

Commonly Asked 420SEL Battery Questions

Turn to Firestone Complete Auto Care for answers to all your car battery questions. If you have a 420SEL-specific battery question, pay us a visit. Our technicians are happy to help.

Why won't my 420SEL battery stay charged? A car battery that needs to be jump-started every time is as good as dead. The battery may be too old. Or, you may have a habit of leaving your car doors open and the cabin light at night. Stop by for a free battery test at your nearest Firestone Complete Auto Care and get a handle on your car battery’s health.
What happens to my old 420SEL battery? We recycle it, taking care of both your car and the Earth.
What’s the cost of DieHard batteries for Mercedes-Benz 420SELs? Get affordable prices on Mercedes-Benz 420SEL 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.
Why is there white, crusty buildup on my 420SEL’s battery post? If you notice white, crusty stuff around the battery terminals of your 420SEL, 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 420SEL’s electrical system, potentially leading to poor performance, difficulty starting, and other issues.
How do I clean a corroded 420SEL battery terminal? You can help prevent or get rid of corrosion by regularly inspecting and cleaning your battery terminals. Before cleaning your battery, see your 420SEL 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.
Who sells 420SEL batteries near me? When you need a new battery for your vehicle, Firestone Complete Auto Care is here to help. We sell and install 420SEL batteries at our stores nationwide — and our Firestone Direct mobile vans can provide convenient on-site battery services. Learn more about our mobile battery services and book an appointment.