Why doesn’t my 300SEL battery stay charged?

A battery is in its final hour when it will no longer hold a charge. The battery may be too old. Or, you’ve been leaving the doors slightly 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 do you do with my old 300SEL battery?

We’ll recycle your car battery for you!

How much will replacing my Mercedes-Benz 300SEL’s battery cost if I get a DieHard battery?

Get affordable prices on Mercedes-Benz 300SEL 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 is a car battery good for?

You can usually get three to five years out of your car battery. However, battery type, how well you maintain your battery, and your driving habits can all affect your battery’s lifespan.

What is the white, crusty stuff around my 300SEL’s battery post?

If you notice white, crusty stuff around the battery terminals of your 300SEL, 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 300SEL’s electrical system, potentially leading to poor performance, difficulty starting, and other issues.

How do I clean a corroded 300SEL 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 300SEL 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 300SEL?

When you need a new battery for your vehicle, Firestone Complete Auto Care is here to help. We sell and install 300SEL 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.

1990 Mercedes-Benz 300SEL Car Batteries

Get a New Mercedes-Benz Battery

Get a New Mercedes-Benz 300SEL Battery

The middle of nowhere is the wrong place to have a weak battery. Shop replacement batteries for 1990 Mercedes-Benz 300SEL today and schedule a quick installation at Firestone Complete Auto Care.

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1990 Mercedes-Benz 300SEL Battery Replacement & Size

Need more info about Mercedes-Benz 300SEL batteries? Check the chart to find the right car battery size and cold cranking amps for your 300SEL.

Battery	Engine	Warranty		Cold Cranking Amps
93-1	L6/3.0L	Replacement 24 months	Performance months	825
49H8	L6/3.0L	Replacement 36 months	Performance months	900
H8-AGM	L6/3.0L	Replacement 36 months	Performance months	900

BATTERIES
L6/3.0L - Battery: 93-1 - Warranty: Replacement 24 months, Performance months - Cold Cranking Amps: 825
L6/3.0L - Battery: 49H8 - Warranty: Replacement 36 months, Performance months - Cold Cranking Amps: 900
L6/3.0L - Battery: H8-AGM - Warranty: Replacement 36 months, Performance months - Cold Cranking Amps: 900

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Shopping for Mercedes-Benz 300SEL Car Batteries

You can pretty much drive your Mercedes-Benz 300SEL until you don't want to anymore. But your 300SEL's battery? Don't count on it to last forever. The average car battery lasts three to five years. You want to replace your 1990 Mercedes-Benz 300SEL battery before it fails and leaves you stranded. Look out for symptoms of a faulty car battery. A slow engine crank, a blinking battery or check engine light, bloated battery case, corroded battery terminals, or faded headlights can all signal that your battery is waving goodbye.

You can also get a Free Battery Test at your local Firestone Complete Auto Care. With computerized testing we can see how much charge is left in your battery. Visit us for a complimentary battery check and, if needed, get your Mercedes-Benz 300SEL a replacement battery. Car batteries are one of our many specialties! Our technicians are well-acquainted with Mercedes-Benz’s service specs for 300SEL car batteries’ reserve capacities and cold cranking amps. Get help figuring out the battery size that fits your car perfectly, and schedule an appointment today for a quick car battery replacement.

Why Choose a DieHard Battery for Your 300SEL?

We know what’s best for your Mercedes-Benz 300SEL, which is why we only carry top-of-the-line replacement parts and batteries. Your 300SEL needs a reliable, durable and powerful battery in extremely hot and cold environments. DieHard batteries shatter expectations using state-of-the-art advancements to fuel the growing power needs of new vehicles and their accessories. They're no ordinary battery, they're extraordinary. Choose a DieHard battery for your Mercedes-Benz 300SEL and get behind the wheel with confidence. Why? Because 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 300SEL Battery

Did you recently have a new 1990 Mercedes-Benz 300SEL car battery installed? Great job! Give your new car battery the best start with proper care. Give your new battery a hand by cutting back on unnecessary short trips, keeping your battery posts clean, and not playing the radio or using other electronics when the engine is turned off.

Answers to Your 300SEL Car Battery Questions

Get answers to common car battery questions, from Firestone Complete Auto Care. If you have battery questions that are Mercedes-Benz 300SEL-specific, stop by your nearest store. Our technicians are happy to help.

Why doesn’t my 300SEL battery stay charged? A battery is in its final hour when it will no longer hold a charge. The battery may be too old. Or, you’ve been leaving the doors slightly 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 do you do with my old 300SEL battery? We’ll recycle your car battery for you!
How much will replacing my Mercedes-Benz 300SEL’s battery cost if I get a DieHard battery? Get affordable prices on Mercedes-Benz 300SEL 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 is a car battery good for? You can usually get three to five years out of your car battery. However, battery type, how well you maintain your battery, and your driving habits can all affect your battery’s lifespan.
What is the white, crusty stuff around my 300SEL’s battery post? If you notice white, crusty stuff around the battery terminals of your 300SEL, 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 300SEL’s electrical system, potentially leading to poor performance, difficulty starting, and other issues.
How do I clean a corroded 300SEL 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 300SEL 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 300SEL? When you need a new battery for your vehicle, Firestone Complete Auto Care is here to help. We sell and install 300SEL 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.