Why doesn’t my 300D battery stay charged?

A battery that won't hold a charge is almost as good as dead. It may be getting old. Or, you may have a habit of leaving your car doors open and the dome lights on during the night. Stop by for a free battery test at your favorite Firestone Complete Auto Care to learn more about the state of your battery.

What happens to my old 300D battery?

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

How much do DieHard batteries cost for your Mercedes-Benz 300D?

You can find affordable 300D 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 often should I replace my car battery?

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 stuff around my 300D’s battery post?

The white, flaky stuff that can build up around your 300D’s battery terminals is known as corrosion. Acid leaking from your vehicle’s battery post can have a chemical reaction with the air, leading to an accumulation of the white, powdery substance over time. Corrosion can affect the flow of electricity between your battery and the electrical system in your 300D, possibly causing issues with electrical performance and starting. If left unaddressed for long enough, it may even cause your battery to prematurely fail.

How do I remove corrosion from my 300D car battery?

Regularly inspect the terminals and clean them with a mixture of baking soda and water, a wire brush, and a rag. Disconnect the battery cables before cleaning to help avoid the risk of electrical shock. Always reference and follow the instructions in your vehicle owner’s manual prior to disconnecting the battery cables.

Who carries 300D batteries near me?

You can shop for 300D 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 300D Batteries

Get a New Mercedes-Benz Battery

Get a Battery for Your Mercedes-Benz 300D

Don't let a failing battery slow you down. Shop replacement batteries for 1990 Mercedes-Benz 300Ds today and schedule a quick installation at Firestone Complete Auto Care.

Shop Batteries

Battery Size & Replacement for 1990 Mercedes-Benz 300D

Researching battery replacements for your Mercedes-Benz 300D? Use this chart to find the right battery size and CCAs for your Mercedes-Benz 300D.

Battery	Engine	Warranty		Cold Cranking Amps
93-1	L5/2.5L	Replacement 24 months	Performance months	825
49H8	L5/2.5L	Replacement 36 months	Performance months	900
H8-AGM	L5/2.5L	Replacement 36 months	Performance months	900

BATTERIES
L5/2.5L - Battery: 93-1 - Warranty: Replacement 24 months, Performance months - Cold Cranking Amps: 825
L5/2.5L - Battery: 49H8 - Warranty: Replacement 36 months, Performance months - Cold Cranking Amps: 900
L5/2.5L - Battery: H8-AGM - Warranty: Replacement 36 months, Performance months - Cold Cranking Amps: 900

Schedule an Appointment

Buy the Right Battery for Your Mercedes-Benz 300D

Sadly, your Mercedes-Benz 300D won't last forever. Neither will its battery. The average car battery lasts three to five years. Check your battery regularly and replace it as needed so it doesn’t leave you and your Mercedes-Benz 300D stranded. Look out for symptoms of a faulty car battery. A sluggish engine start, a blinking battery or check engine light, bloated battery case, corroded battery terminals, and subpar electrical performance may all indicate that your battery needs attention.

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, a replacement battery for your 1990 Mercedes-Benz 300D. Car batteries are only one of our many strong suits. Our technicians are familiar with Mercedes-Benz-specific recommendations for 300D battery cold cranking amps and reserve capacity. Get help identifying the type and size of battery that's best for your 300D, and schedule a fast car battery replacement at your earliest convenience.

Firestone Has DieHard Batteries for 300Ds

We know what’s best for your Mercedes-Benz 300D, which is why we only carry top-of-the-line replacement parts and batteries. Your 300D needs a reliable, durable and powerful battery that can handle most extreme environments and weather conditions. DieHard batteries shatter expectations using state-of-the-art advancements to satisfy the increasing power demands of modern vehicles They're no ordinary battery, they're extraordinary. Buy a DieHard battery for your Mercedes-Benz 300D 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.

After Buying 1990 Mercedes-Benz 300D Battery

Did you recently have a new 1990 Mercedes-Benz 300D car battery installed? 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 not playing the radio or using other electronics when the engine is turned off.

Commonly Asked 300D Battery Questions

Get answers to common car battery questions, from Firestone Complete Auto Care. If you have a 300D-specific battery question, pay us a visit. Our technicians are happy to help.

Why doesn’t my 300D battery stay charged? A battery that won't hold a charge is almost as good as dead. It may be getting old. Or, you may have a habit of leaving your car doors open and the dome lights on during the night. Stop by for a free battery test at your favorite Firestone Complete Auto Care to learn more about the state of your battery.
What happens to my old 300D battery? We recycle it, taking care of both your car and the Earth.
How much do DieHard batteries cost for your Mercedes-Benz 300D? You can find affordable 300D 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 often should I replace my car battery? 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 stuff around my 300D’s battery post? The white, flaky stuff that can build up around your 300D’s battery terminals is known as corrosion. Acid leaking from your vehicle’s battery post can have a chemical reaction with the air, leading to an accumulation of the white, powdery substance over time. Corrosion can affect the flow of electricity between your battery and the electrical system in your 300D, possibly causing issues with electrical performance and starting. If left unaddressed for long enough, it may even cause your battery to prematurely fail.
How do I remove corrosion from my 300D car battery? Regularly inspect the terminals and clean them with a mixture of baking soda and water, a wire brush, and a rag. Disconnect the battery cables before cleaning to help avoid the risk of electrical shock. Always reference and follow the instructions in your vehicle owner’s manual prior to disconnecting the battery cables.
Who carries 300D batteries near me? You can shop for 300D 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.