Why doesn’t my 420SEL 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’ve been leaving the doors slightly open and the cabin light at night. Stop in for a free battery check at your favorite Firestone Complete Auto Care to learn more about the state of your battery.

What do you do with my old 420SEL battery?

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

How much will replacing my Mercedes-Benz 420SEL’s battery cost if I get a DieHard battery?

You can find affordable 420SEL 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?

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 substance accumulating on my 420SEL’s battery post?

The white, crusty stuff that can accumulate around 420SEL 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 420SEL car battery?

Regularly inspecting and cleaning your battery terminals will help keep your 420SEL’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 420SEL batteries near me?

You can shop for 420SEL 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.

1990 Mercedes-Benz 420SEL Car Batteries

Get a New Mercedes-Benz Battery

Get a Battery for Your Mercedes-Benz 420SEL

Don't let a failing battery slow you down. Shop replacement batteries for 1990 Mercedes-Benz 420SELs today and schedule a quick installation at Firestone Complete Auto Care.

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1990 Mercedes-Benz 420SEL Battery Replacement & Size

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
T8	V8/4.2L	Replacement 36 months	Performance months	800
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: T8 - Warranty: Replacement 36 months, Performance months - Cold Cranking Amps: 800
V8/4.2L - Battery: H8-AGM - Warranty: Replacement 36 months, Performance months - Cold Cranking Amps: 900

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Shopping for Mercedes-Benz 420SEL Car Batteries

Sadly, your Mercedes-Benz 420SEL won't last forever. Neither will its battery. The average car battery lasts three to five years. You want to replace your 1990 Mercedes-Benz 420SEL battery before it fails and leaves you stranded. Look out for symptoms of a faulty car battery. A slow engine crank, an illuminated battery or check engine light, swollen battery case, corrosion-covered posts, and subpar electrical performance 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 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, get your Mercedes-Benz 420SEL a replacement battery. Car batteries are only one of our many strong suits. Our expert technicians understand Mercedes-Benz service recommendations for 420SEL battery cold cranking amps and reserve capacity. Get help choosing the battery size that fits your car perfectly, and schedule a weekday or weekend battery replacement service for your car.

Is There a DieHard Battery for 420SELs?

Your Mercedes-Benz 420SEL deserves the best, which is why we exclusively carry the best. 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 expanding power needs of new vehicles and their accessories. Don't call a DieHard battery ordinary. It's an extraordinary battery. Go with a DieHard battery for your 420SEL and drive with confidence knowing that your battery will perform when you need it. That’s why you should choose batteries from Firestone Complete Auto Care.

Caring for a New Mercedes-Benz 420SEL Battery

Have you recently had a fresh battery installed in your Mercedes-Benz 420SEL? Congrats! You can give your new battery a head start with proper care and attention. Help extend your car battery’s life by limiting short trips, cleaning your battery posts, and not playing the radio or using other electronics when the engine is turned off.

Answers to Your 420SEL Car Battery Questions

Firestone Complete Auto Care has answers to your top car battery questions. If you have a 420SEL-specific battery question, pay us a visit. Our expert techs have the answers you need.

Why doesn’t my 420SEL 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’ve been leaving the doors slightly open and the cabin light at night. Stop in for a free battery check at your favorite Firestone Complete Auto Care to learn more about the state of your battery.
What do you do with my old 420SEL battery? We recycle it! Nearly 100% of all lead-acid batteries are recyclable.
How much will replacing my Mercedes-Benz 420SEL’s battery cost if I get a DieHard battery? You can find affordable 420SEL 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? 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 substance accumulating on my 420SEL’s battery post? The white, crusty stuff that can accumulate around 420SEL 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 420SEL car battery? Regularly inspecting and cleaning your battery terminals will help keep your 420SEL’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 420SEL batteries near me? You can shop for 420SEL 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.