What happens if my Mercedes-Benz S420 spark plugs fail?

Replace spark plugs on time or about every 30,000 miles or so. Spark plugs are small but mighty. The spark of electricity that the plug emits across a small gap creates the ignition for the combustion needed to start your car. Without that spark, your car won't start.

What should I do if I see leaks under my S420?

Puddles could indicate an oil leak, coolant leak, or brake fluid leak– all of which can critically hurt your engine. Have your engine inspected as soon as you spot a pool of liquid in your usual parking spot.

Are hard starts and stops bad for my Mercedes-Benz S420 engine?

Hard starts and stops put extra wear and tear on engine components. Smooth, gradual starts and stops, on the other hand, are a great way to help your engine run better. They can also help maximize your fuel economy.

Where can I get a Mercedes-Benz S420 tune-up?

At your local Firestone Complete Auto Care! Our technicians know how to service, maintain, and repair Mercedes-Benz S420s.

How often do Mercedes-Benz S420 fuel injectors need to be cleaned?

There is no hard and fast rule on how often fuel injectors should be cleaned, and it can vary based on driving habits and fuel type. Some manufacturers may suggest including a fuel system cleaning in your regular maintenance schedule. Or you may need to clean your fuel injectors as needed if you notice signs of a fuel system problem.

Who can I go to for Mercedes-Benz S420 tune-ups?

Visit your nearby Firestone Complete Auto Care for Mercedes-Benz S420 tune-ups and more. Schedule your appointment online and save big by checking out our latest offers.

1998 Mercedes-Benz S420 Tune-Up & Engine Service

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Schedule Your Mercedes-Benz S420 Tune-Up Service Appointment

Tune in to tune up. Listen to your S420 and schedule an engine tune-up at the first strange squeak, clunk, or click. Make an appointment today.

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Tune-Ups to Help Your Mercedes-Benz S420 Run Better

Is your engine overdue for a tune-up? If you're the type of driver who waits for something to go wrong with your vehicle, now is the time to work on that habit, especially if you drive a 1998 Mercedes-Benz S420. Routine engine tune-ups can bring power back to your S420. They're designed to help your engine start easier and run more efficiently, which can mean better fuel economy (a win for you) and lower emissions (a win for the environment). When you take your car for regular engine tune-ups as recommended by Mercedes-Benz, you can rest assured you’re investing in your S420’s long-term engine performance.

Engine Tune-Up for Mercedes-Benz S420

Your local Firestone Complete Auto Care offers a range of engine tune-up services for your 1998 Mercedes-Benz S420. The first is the standard Firestone Tune-Up. The standard Firestone Tune-Up includes new spark plugs (and installation!), a thorough inspection of engine components, and a lifetime parts warranty*. Another service option pays special attention to the filters in your S420. Specifically, we replace the fuel filter and air filter. The third tune-up option is a fuel system cleaning service, which is a three-step process that removes varnish, dirt, and carbon deposits on your S420's fuel injectors, throttle body, and throttle plate. The result? Restored fuel system performance. Here’s something to remember when choosing services: the mileage and service history of your S420 can determine what kind of service it needs. If you’re not sure what services are the best fit for your car, let us help! Chat with a Firestone technician before you jump into a specific service to ensure your engine tune-up money is well-spent.

Where Should I Go for My Mercedes-Benz S420 Tune-Up?

Schedule your next 1998 S420 engine tune-up service at Firestone Complete Auto Care. Follow Mercedes-Benz's recommended maintenance schedule or book an appointment as soon as you notice one of the following: decreased gas mileage, "rough" idling or stalling when stopped, an illuminated check engine light on your dashboard, or a knocking sound when the engine is running.

*Check with a teammate at Firestone Complete Auto Care for complete terms and conditions regarding warranties.

Common Engine Tune-Up Q&A For 1998 Mercedes-Benz S420s

What happens if my Mercedes-Benz S420 spark plugs fail? Replace spark plugs on time or about every 30,000 miles or so. Spark plugs are small but mighty. The spark of electricity that the plug emits across a small gap creates the ignition for the combustion needed to start your car. Without that spark, your car won't start.
What should I do if I see leaks under my S420? Puddles could indicate an oil leak, coolant leak, or brake fluid leak– all of which can critically hurt your engine. Have your engine inspected as soon as you spot a pool of liquid in your usual parking spot.
Are hard starts and stops bad for my Mercedes-Benz S420 engine? Hard starts and stops put extra wear and tear on engine components. Smooth, gradual starts and stops, on the other hand, are a great way to help your engine run better. They can also help maximize your fuel economy.
Where can I get a Mercedes-Benz S420 tune-up? At your local Firestone Complete Auto Care! Our technicians know how to service, maintain, and repair Mercedes-Benz S420s.
How often do Mercedes-Benz S420 fuel injectors need to be cleaned? There is no hard and fast rule on how often fuel injectors should be cleaned, and it can vary based on driving habits and fuel type. Some manufacturers may suggest including a fuel system cleaning in your regular maintenance schedule. Or you may need to clean your fuel injectors as needed if you notice signs of a fuel system problem.
Who can I go to for Mercedes-Benz S420 tune-ups? Visit your nearby Firestone Complete Auto Care for Mercedes-Benz S420 tune-ups and more. Schedule your appointment online and save big by checking out our latest offers.

Proactive Maintenance - 1998 Mercedes-Benz S420

Stay ahead of any potential issues with your Mercedes-Benz S420 so your car can keep pace with life! Learn more about proper maintenance for your vehicle below.

Repair Service for Your 1998 Mercedes-Benz S420

Your car takes care of you, and we’ll take care of your car. When it’s time for a repair on your Mercedes-Benz S420, we’re here to help. Check out more info below about 1998 Mercedes-Benz S420 repairs.