Why doesn’t my 300SD battery stay charged?

A battery is in its final hour when it will no longer hold a charge. The battery might be old. Or, you’ve been leaving the doors slightly open and the lights on overnight. Stop in for a free battery check at your favorite Firestone Complete Auto Care and learn more about your battery's charge.

What happens to my old 300SD battery?

We’ll recycle your car battery for you!

What’s the cost of DieHard batteries for Mercedes-Benz 300SDs?

Get affordable prices on Mercedes-Benz 300SD 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?

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.

Why is there white, flaky stuff around my 300SD’s battery post?

The white, crusty stuff that can accumulate around 300SD 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 300SD car battery?

To help extend the life of your battery, you should routinely inspect and clean the terminals using a baking soda and water mix, wire brush, and rag. Be sure to disconnect the battery cables before cleaning and check your 300SD owner’s manual for instructions on how to do so.

Where can I find a battery for my 300SD?

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

1985 Mercedes-Benz 300SD Car Batteries

Get a New Mercedes-Benz Battery

Get a New Mercedes-Benz 300SD Battery

Don’t let a dead battery stop you. Shop replacement car batteries for your 1985 Mercedes-Benz 300SD at Firestone Complete Auto Care.

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1985 Mercedes-Benz 300SD Battery Replacement & Size

Need more info about Mercedes-Benz 300SD batteries? Use the following chart to find information on Mercedes-Benz 300SD battery size and cold cranking amps.

Battery	Engine	Warranty		Cold Cranking Amps
93-1	L5/3.0L	Replacement 24 months	Performance months	825
49H8	L5/3.0L	Replacement 36 months	Performance months	900
H8-AGM	L5/3.0L	Replacement 36 months	Performance months	900

BATTERIES
L5/3.0L - Battery: 93-1 - Warranty: Replacement 24 months, Performance months - Cold Cranking Amps: 825
L5/3.0L - Battery: 49H8 - Warranty: Replacement 36 months, Performance months - Cold Cranking Amps: 900
L5/3.0L - 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 300SD

Your 300SD doesn't have an expiration date, but its battery does. Generally, car batteries last from three to five years. Don’t get stranded by your 300SD’s car battery. Replace it regularly instead! Pay attention to clues that your battery is on its way out. A lagging starter, an illuminated battery or check engine light, bloated battery case, corroded battery posts, or faded headlights may all indicate that your battery is waving goodbye.

Plus, at Firestone Complete Auto Care, we’ll test your battery for free. Our equipment can see how much charge is left in your battery. Visit us for a complimentary battery check and, if needed, get your Mercedes-Benz 300SD a replacement battery. Car batteries are one of our many specialties! Our technicians are familiar with Mercedes-Benz-specific recommendations for 300SD battery cold cranking amps and reserve capacity. Get help choosing the battery size that matches your vehicle, and schedule a weekday or weekend battery replacement service for your car.

Is There a DieHard Battery for 300SDs?

We know what’s best for your Mercedes-Benz 300SD, which is why we exclusively carry the best. You need 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 fuel the expanding power demands of new vehicles. A DieHard battery isn't an ordinary car battery. It's extraordinary. Buy a DieHard battery for your Mercedes-Benz 300SD 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.

Caring for a New Mercedes-Benz 300SD Battery

Have you recently had a fresh battery installed in your Mercedes-Benz 300SD? Good thinking! You can give your new battery a head start with proper care and attention. ensuring all the lights are turned off before you leave the car, limiting short trips, keeping your battery posts clean, and avoiding radio and electronic component use when the engine is off.

Commonly Asked 300SD Battery Questions

Firestone Complete Auto Care has answers to your top car battery questions. If you have battery questions that are Mercedes-Benz 300SD-specific, visit your nearest store. Our technicians have the answers.

Why doesn’t my 300SD battery stay charged? A battery is in its final hour when it will no longer hold a charge. The battery might be old. Or, you’ve been leaving the doors slightly open and the lights on overnight. Stop in for a free battery check at your favorite Firestone Complete Auto Care and learn more about your battery's charge.
What happens to my old 300SD battery? We’ll recycle your car battery for you!
What’s the cost of DieHard batteries for Mercedes-Benz 300SDs? Get affordable prices on Mercedes-Benz 300SD 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? 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.
Why is there white, flaky stuff around my 300SD’s battery post? The white, crusty stuff that can accumulate around 300SD 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 300SD car battery? To help extend the life of your battery, you should routinely inspect and clean the terminals using a baking soda and water mix, wire brush, and rag. Be sure to disconnect the battery cables before cleaning and check your 300SD owner’s manual for instructions on how to do so.
Where can I find a battery for my 300SD? When you need a new battery for your vehicle, Firestone Complete Auto Care is here to help. We sell and install 300SD 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.