Why won't my SLK230 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 may have been leaving your car doors ajar and the cabin light at night. Stop in for a free battery check at your local Firestone Complete Auto Care to learn more about the state of your battery.

What happens to my old SLK230 battery?

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

How much will replacing my Mercedes-Benz SLK230’s battery cost if I get a DieHard battery?

Mercedes-Benz SLK230 batteries can be affordable, especially when there's an available battery coupon. The best part is every DieHard battery comes with a free replacement warranty and extra coverage with DieHard Assurance.

What is the average lifespan of a car battery?

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 SLK230’s battery post?

The white, flaky stuff that can build up around your SLK230’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 SLK230, 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 clean corrosion off my SLK230 vehicle 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 SLK230 owner’s manual for instructions on how to do so.

Where can I find a battery for my SLK230?

At Firestone Complete Auto Care, we make it easy to get a new car battery. Our stores sell and install SLK230 batteries, and our Firestone Direct mobile vans can even come to you for added convenience. Check out our mobile battery services to learn more.

2003 Mercedes-Benz SLK230 Batteries

Get a New Mercedes-Benz Battery

Get a New Mercedes-Benz SLK230 Battery

Don't let a failing battery slow you down. Shop replacement batteries for 2003 Mercedes-Benz SLK230s today and schedule a quick installation at Firestone Complete Auto Care.

Shop Batteries

The Right Battery Size for a 2003 Mercedes-Benz SLK230

Researching battery replacements for your Mercedes-Benz SLK230? Check the chart to find the right car battery size and cold cranking amps for your SLK230.

Battery	Engine	Warranty		Cold Cranking Amps
48H6	L4/2.3L	Replacement 36 months	Performance months	730
H6-AGM	L4/2.3L	Replacement 36 months	Performance months	760

BATTERIES
L4/2.3L - Battery: 48H6 - Warranty: Replacement 36 months, Performance months - Cold Cranking Amps: 730
L4/2.3L - Battery: H6-AGM - Warranty: Replacement 36 months, Performance months - Cold Cranking Amps: 760

Schedule an Appointment

Buying a Replacement Battery for Mercedes-Benz SLK230

Your SLK230 doesn't have an expiration date, but its battery does. On average, auto batteries last anywhere from three to five years. Check your battery regularly and replace it as needed so it doesn’t leave you and your Mercedes-Benz SLK230 stranded. Watch for signs that your current battery is getting too old or too weak. A lagging starter, an illuminated check engine light or battery signal, swollen battery case, corrosion-covered posts, or dim headlights can all be signs 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. Drop in for a free battery check and, if necessary, a battery replacement to help keep your 2003 Mercedes-Benz SLK230 running! Car batteries are only one of our many strong suits. Our technicians are well-acquainted with Mercedes-Benz’s service specs for SLK230 battery CCAs and reserve capacity. Get help identifying the type and size of battery that's best for your SLK230, and schedule a weekday or weekend battery replacement service for your car.

Firestone Has DieHard Batteries for SLK230s

We know what’s best for your Mercedes-Benz SLK230, which is why we carry just that. Your vehicle needs a reliable, durable and powerful battery in even the most extreme conditions. DieHard SLK230 batteries surpass expectations using state-of-the-art advancements to meet the increasing power requirements of new vehicles and their accessories. They're no ordinary battery, they're extraordinary. Go with a DieHard battery for your SLK230 and drive with confidence knowing that performance will be there when you need it most. That's the kind of battery we deliver.

Caring for a New Mercedes-Benz SLK230 Battery

Have you recently had a fresh battery installed in your Mercedes-Benz SLK230? Good thinking! You can give your new battery a head start with proper care and attention. You can take care of your battery by decreasing the number of short trips you take, keeping your battery posts clean, and not using electronics such as the radio and power outlets when the engine is off.

Answers to Your SLK230 Car Battery Questions

Turn to Firestone Complete Auto Care for answers to all your car battery questions. If you have a SLK230-specific battery question, visit your nearest store. Our technicians are happy to help.

Why won't my SLK230 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 may have been leaving your car doors ajar and the cabin light at night. Stop in for a free battery check at your local Firestone Complete Auto Care to learn more about the state of your battery.
What happens to my old SLK230 battery? We recycle it, taking care of both your car and the Earth.
How much will replacing my Mercedes-Benz SLK230’s battery cost if I get a DieHard battery? Mercedes-Benz SLK230 batteries can be affordable, especially when there's an available battery coupon. The best part is every DieHard battery comes with a free replacement warranty and extra coverage with DieHard Assurance.
What is the average lifespan of a car battery? 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 SLK230’s battery post? The white, flaky stuff that can build up around your SLK230’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 SLK230, 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 clean corrosion off my SLK230 vehicle 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 SLK230 owner’s manual for instructions on how to do so.
Where can I find a battery for my SLK230? At Firestone Complete Auto Care, we make it easy to get a new car battery. Our stores sell and install SLK230 batteries, and our Firestone Direct mobile vans can even come to you for added convenience. Check out our mobile battery services to learn more.