What happens if my Mercedes-Benz 350SD 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 do I do if I see a pool of liquid under my Mercedes-Benz 350SD?

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 some driving habits better for my Mercedes-Benz 350SD engine than others?

You can make your driving habits more engine-friendly. Hard starts and stops can increase the stress on engine parts, especially over many years. Boost your fuel economy and care for your engine by using gradual, smooth starts and stops instead.

Where can I have a Mercedes-Benz 350SD tune-up done?

At your closest Firestone Complete Auto Care! Our experienced technicians offer Mercedes-Benz 350SD service, maintenance, and repairs.

How frequently do the fuel injectors in my Mercedes-Benz 350SD need to be cleaned?

The frequency at which car fuel injectors should be cleaned can vary depending on several factors, including the type of fuel used and the driving conditions. Some manufacturers generally recommend a fuel system cleaning as part of your general car maintenance, or as needed based on symptoms of poor fuel system performance.

Who offers Mercedes-Benz 350SD tune-ups?

Visit your local Firestone Complete Auto Care for your Mercedes-Benz 350SD tune-up. Make an appointment online and view our latest offers to save big.

1991 Mercedes-Benz 350SD Engine Tune-Ups & Maintenance

Get a Tune-Up

Schedule Your Mercedes-Benz 350SD Tune-Up Service Appointment

If your 350SD is acting strange or making new noises, it could be engine tune-up time. Don’t wait until small problems get bigger. Make an appointment now.

Schedule an Appointment

Tune Into Your Mercedes-Benz 350SD

Is it tune-up time? If you tend to ignore your car until something goes wrong, now is the time to work on that habit, especially if you want your 1991 Mercedes-Benz 350SD’s engine to last for a long time. Regular engine tune-ups can optimize your 350SD’s power on the road. Tune-ups give your engine a boost in efficiency, so you can enjoy improved fuel economy and lower emissions. When you get routine engine tune-ups based on Mercedes-Benz's recommendations, you’re taking vital steps toward keeping your 350SD’s engine running smoother, longer.

Engine Tune-Up for Mercedes-Benz 350SD

The Firestone Complete Auto Care location in your community offers several Mercedes-Benz 350SD engine tune-up services. The first is the standard Firestone Tune-Up. This includes the installation of new spark plugs and a visual inspection of your engine’s components, plus a lifetime warranty on parts*. A second service option replaces the air and fuel filter in your 350SD. Our third service is a thorough cleaning of the fuel system. During this type of tune-up, we use a three-step process to get rid of harmful varnish, dirt, and carbon deposit buildup in your 350SD’s fuel injectors, throttle body, and throttle plate. The result? Restored fuel system performance. Keep in mind that your 350SD's mileage and maintenance history can uniquely impact its tune-up needs. If you’re not sure what services are the best fit for your car, let us help! Talk to a technician about your driving style, mileage, and service history to learn more about your vehicle's specific needs.

Where to Get a Mercedes-Benz 350SD Tune-Up

Come to Firestone Complete Auto Care for your next 1991 350SD engine tune-up. Consult your vehicle’s recommended service schedule from Mercedes-Benz, or make a service appointment if you notice any of these symptoms from your engine: decreased gas mileage, "rough" idling or stalling when stopped, engine knocking, or an illuminated check engine light.

*Talk to a Firestone Complete Auto Care teammate for full terms and conditions on warranties.

Questions About 1991 Mercedes-Benz 350SD Engine Tune-Ups

What happens if my Mercedes-Benz 350SD 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 do I do if I see a pool of liquid under my Mercedes-Benz 350SD? 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 some driving habits better for my Mercedes-Benz 350SD engine than others? You can make your driving habits more engine-friendly. Hard starts and stops can increase the stress on engine parts, especially over many years. Boost your fuel economy and care for your engine by using gradual, smooth starts and stops instead.
Where can I have a Mercedes-Benz 350SD tune-up done? At your closest Firestone Complete Auto Care! Our experienced technicians offer Mercedes-Benz 350SD service, maintenance, and repairs.
How frequently do the fuel injectors in my Mercedes-Benz 350SD need to be cleaned? The frequency at which car fuel injectors should be cleaned can vary depending on several factors, including the type of fuel used and the driving conditions. Some manufacturers generally recommend a fuel system cleaning as part of your general car maintenance, or as needed based on symptoms of poor fuel system performance.
Who offers Mercedes-Benz 350SD tune-ups? Visit your local Firestone Complete Auto Care for your Mercedes-Benz 350SD tune-up. Make an appointment online and view our latest offers to save big.

Maintenance for Your 1991 Mercedes-Benz 350SD

We know it’s not just a car, it’s your car. We’ll help you properly maintain your Mercedes-Benz 350SD to keep it on the road and running smoothly. Learn more about maintenance below.

1991 Mercedes-Benz 350SD Repair

Nothing lasts forever. Even your Mercedes-Benz 350SD's many parts and pieces. When something breaks, we're ready. Click on a repair below to learn more about 1991 Mercedes-Benz 350SD repairs.