At what mileage do Mercedes start having problems?

At what mileage do Mercedes start having problems?

Mercedes-Benz produces some of the most reliable vehicles on the market. But like other cars, they also start developing problems after some miles.

Since there are many Mercedes-Benz models, there is no candid answer to what mileage Mercedes cars start having problems. Some Mercedes-Benz car models begin as early as 50,000 miles, while others wait to hit up to 100,000 miles, before experiencing minor issues.

Therefore, the Mercedes-Benz car model you choose is vital when it comes to reliability and performance over a long period. The E-Class model offers the best performance. It’s also the most reliable Mercedes-Benz model on the market. That’s why it’s preferred by many people around the world.

Mercedes-Benz Warranty

Like many luxury cars, Mercedes-Benz cars feature a 4-year or 50,000-mile warranty. If your car develops an unusual problem within this period, you can have a repair or replacement done. Nevertheless, you should still expect to pay for having minor repairs done like tires, brake pads, air filters, fuel filters, and that type of thing.

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Common Mercedes-Benz problems before 100,000 miles

A handful of Mercedes-Benz car models begin to have problems before they hit 100,000 miles, but it differs from one Benz model to another. So, before you buy your car, find out when your car will start to experience problems. Here are some of the usual problems before your car hits 100,000 miles:

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Catalytic converter failure

A catalytic converter works to convert carbon monoxide, hydrocarbons, and nitrogen oxides in car exhaust into nontoxic compounds. Regrettably, catalytic converters in most Mercedes-Benz car models become faulty after only 60,000 miles. They may become clogged or fail to work altogether.

As a result, your car may start to develop issues like bad fuel efficiency, difficulty starting, failing emissions tests, black smoke from the tailpipe, and more. You should replace the catalytic converter to avoid your car from having more issues. Note that the price of a new catalytic converter varies from one model to another.

Ignition failure

Another typical problem found in most Mercedes-Benz models before they hit 100,000 miles is ignition failure. Most Mercedes-Benz models develop ignition failure after 75,000 miles. The work of the ignition system is to form an electric spark in the engine combustion chamber, at a precise time, which will help ignite the air/fuel mixture.

If the ignition system is bad, your car will stall, fail to start, or the check engine light will turn on. If you own a Mercedes car, you should check your ignition when you hit around 75,000 miles. Don’t wait for it to fail to change it or inspect it.

Spark plug failure

Most Mercedes-Benz car models develop spark plug problems around 100k miles, meaning, it may come before 100,000 miles or after. Spark plugs help to ignite the air/fuel mixture. But as your car puts on several miles, this electrical device starts to wear out.  

The spark plug problem is not only for Mercedes-Benz cars but all vehicles. A bad or failing spark plug can lead to issues such as engine misfires, poor gas mileage, hard starts, and rough idling. Replacing spark plugs is not difficult and can even be done by a DIY enthusiast.

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Common Mercedes-Benz problems after 100,000 miles

This is where most Mercedes-Benz car model problems lie. Many Mercedes cars will start to develop issues after 100,000 miles. Here are some of the problems that you should expect to undergo when you hit over 100k:


Some Mercedes car models may not show or undergo any serious issues, but they will develop rust. As your car ages and puts on miles, expect to find rust in many parts of your car. It doesn’t matter if it’s an E-Class, S-Class, C-Class, A-Class, or even GL-Class; they all rust after some time.


Mercedes-Benz may boast of one of the best transmission systems on the market, but it’s also one of their weakest parts. The 5-speed automatic transmission features a 13-pin connector and valve that might develop problems after you hit 100k miles.

After 100k miles, the connector may start to leak transmission fluid, while the valve body may cause bad shifting. Inspect these parts when you hit the 100,000 miles with your Mercedes.

Suspension and steering system failure

The suspension and steering system are other problems that all Mercedes car owners should be prepared to face when they cover 100k miles. The suspension system features springs, wheels, tire air, linkages, shock absorbers, control arm bushings, tie rods, and ball joints.

In some car models, parts like control arm bushings, tie rods, sway bar links, and ball joints develop problems even before 100k miles. Always inspect these parts when your car hits 100k miles.

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FAQs about buying a high-mileage Benz

Is it okay to buy a used Mercedes-Benz with more than 50,000 miles on it?

Buying a Mercedes with 50k miles on it is okay. But there are several things to consider before paying for the car. You have to look at its condition and maintenance history. Additionally, you have to consider the model as some Mercedes-Benz models start developing problems as early as 50k miles. Note that the Mercedes-Benz warranty becomes invalid after 50,000 miles.

Are Mercedes-Benz cars reliable after covering 100,000 miles?

It depends on how you take care of the car. If you maintain your Mercedes properly, it should do over 200,000 miles without any issues. However, the model of your car also matters a lot. Some Mercedes-Benz models, such as the E-Class are more durable and reliable than other models.

How much mileage should I expect out of my Mercedes-Benz?

If properly maintained, you should get at least 300,000 miles or even more out of your car. Generally, it will depend on your car model. Also, the replacement parts that you buy when your car breaks down will play a huge role in its durability. Stick to OEM parts for the longevity of your car.

Final thoughts

Before buying a used Mercedes-Benz car, you need to consider some of the problems you might face. Different Mercedes models develop issues at different miles. Some experience issues after a few miles, while others take longer. Make sure you choose a model that is more durable and reliable in the long run.

At what mileage do Mercedes start having problems?

Marko Mikulic

Why do you love writing about cars? I love writing about cars as cars are a huge personal interest of mine. I was raised in a car enthusiast community and ever since I was young, I always wanted to do car-related work.

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