Are Mercedes Reliable After 100k Miles?

Before I answer the question are Mercedes reliable after 100k miles, you need to understand that Mercedes-Benz makes some of the most efficient vehicles on the market.

Some Mercedes-Benz cars experience minor faults as soon as around 50,000 miles, whereas others do not have any problems until about 100,000 miles. As a result, the Mercedes-Benz vehicle model you select is critical in terms of long-term reliability and performance.

What Problems do Mercedes Have After 100k Miles?

Mercedes-Benz vehicles, like many other luxury vehicles, come with a 4-year or rather 50,000-mile warranty. You can have your car repaired or replaced if it develops an uncommon problem during this time.

Purchasing a pre-owned Benz, even if it is still protected by the manufacturer’s guarantee, is a risky option since not everything that could go amiss will be covered. Around 100 miles or pre or post 100 000 miles, many Mercedes-Benz car models experience spark plug faults.

Other issues that all Mercedes automobile owners should be aware of once they reach 100,000 miles include the steering and suspension systems. Springs, wheels, tire air, linkages, shocks, and control arm bushings, tie rods, plus ball joints are all part of the suspension system.

Estimate for a C300 Suspension Shock and Strut Replacement.

The cost of labour is projected to be between $354 and $446, with parts costing around $1,864 and $1,870.

When it comes to Mercedes-more Benz’s airmatic elements, there have been a few noted problems, but the most common complaints are over the air suspension.

Air suspension was first introduced to Mercedes-Benz automobiles in the year 2000 when the S-Class W220 was first equipped with it.

Also read: 3 Cheapest Mercedes to Maintain (+ Costs)

Keep in mind that the costs of auto suspension replacement are mostly dictated by the vehicle’s make, model, and condition. Luxury cars, such as a Mercedes-Benz, have greater suspension repair expenses.

Even if you don’t drive a luxury automobile, a car with a lot of rust underneath can make accessing and removing key vehicle parts far more time-consuming for any specialist, which results in a greater cost.

The connector may begin leaking transmission fluid after 100k miles, whereas the valve body could cause improper shifting. When your Mercedes reaches 100,000 miles, inspect these parts.

Certain Mercedes models may not exhibit or have major problems, yet they will rust. Expect to encounter rust in numerous components of your car as it ages and accumulates miles. It makes no difference whether it’s the E-Class, S-Class, C-Class, A-Class, or perhaps even GL-Class; they all rust eventually.

After cleaning your Mercedes, make sure to properly rinse it off, since soap remaining on the car will degrade the paint and encourage rust. Furthermore, you need to wax your Mercedes at least 2 times a year, as this not only improves its appearance but also provides a protective covering against corrosion.

Mercedes-Benz vehicles have oil-filled engine mounts. Their primary function is to prevent engine vibrations from entering the cabin. They begin to fail or rather lose oil after 100,000 miles since they are oil-filled.

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Significant vibration on the seats, inside the cabin, and also on the steering wheel can occur whenever the engine mounts fail. Also, when you purchase engine mounts online, you find out that the price is usually very affordable.

Paying attention to how you drive, what you put inside your car, and keeping your service appointments is one of the best ways to keep these components in good shape.

You don’t want problems with the transmission and otherwise engine, especially if you’re driving a Mercedes. If you don’t take better care of these parts, the replacement expenses could run into the thousands.

Also read: Is Mercedes W164 Reliable? (Solved)

How to Make Sure Your Mercedes Will be Reliable After 100k Miles?

More miles are added to your vehicle as you keep it on the road longer. Here are a few things users can do from beginning to end to extend the life of your car as it approaches the 6-figure mark and beyond:

  1. Your Mercedes-Benz should be cleaned properly

Frequent washes and waxes will keep the body of your vehicle clean and free of dirt, grime, and buildup. This will assist to protect your vehicle’s finish and prevent rust. Vacuum cleaning the carpets and washing down the dash are also helpful ways to keep the interior clean.

Also read: Is Mercedes W124 Reliable? (Important Facts)

2. Focus on Safety

Making ensuring your Benz is safe to drive is one of the finest ways to keep it in fantastic shape. Filling wiper fluid tanks, replacing wiper blades regularly, and cleaning the headlamps are all maintenance jobs that improve your visibility on the road and help you avoid accidents and other tragedies that might destroy your car.

Maintaining the condition of your tires can also allow you to stay safe. Have them rotated regularly and keep an eye out for hints of wear. Make checking tire pressures a habit, particularly during the spring and fall, when temperature changes can have a substantial impact on tire pressure.

3. Make Use of Only Mercedes-Certified Technicians

The smartest thing you could do for your Mercedes is establishing a relationship with a Mercedes-certified technician in your area. The Mercedes-certified technician will assist you in keeping your automobile in excellent shape for about as long as you have it.

4. Follow the Maintenance Plan

The key to extending the life of your car is to stick to a regular, scheduled maintenance plan that is particular to the make and model of your vehicle. From small repairs such as oil changes and tire rotations to more substantial services such as belt replacement and anything in between, we’ve got you covered!

Also read: Is Mercedes W211 Reliable? (Important Facts)

Allow your authorized Mercedes-Benz repair professional to examine the vehicle beneath the hood or even come up with a strategy for what needs to be done right once and what can wait a little longer, before long-term damage develops.

5. Resist Using Cheap Spare Parts

Put simply, if you want something to last, don’t buy it cheap! The best components are those that are produced to the manufacturer’s requirements for your car. Buying a low-cost part could damage your car and result in costly repair later, so it’s best to go for a name-brand part rather than a no-name part.

Also read: 5 Serious Reasons Why Mercedes are so Expensive

What are the Most and Least Reliable Mercedes-Benz After 100k Miles?

Following are the most reliable models produced by Mercedes-Benz:

  1. Mercedes-Benz E-Class
  2. Mercedes-Benz GLC
  3. Mercedes-Benz C-Class

  1. Mercedes-Benz E-Class

Across all models of Mercedes-Benz, E-Class is probably the most reliable one. In the J.D power survey Mercedes E-Class has a predicated reliability of 75 out of 100. 2012 model of E-Class has been rated best for reliability. So, these are the cars that would have crossed 100k miles by now. And will last significant time ahead.

Also read: Is Mercedes W210 Reliable? (Important Facts)

  1. Mercedes-Benz GLC

The futuristic design and uncompromised safety of GLC made it the perfect car. A survey was done in Europe that ranked GLC 38th out of 75 cars. It had a predicated reliability of 78 out of 100. So, it is very likely to stay reliable even after crossing 100k miles.

  1. Mercedes-Benz C-Class

Mercedes C-Class might not have the best quality but it is still considered as one of the most reliable cars in the Mercedes lineup. It had very light steering, sporty suspension, and an active safety mechanism.

Following are the least reliable models of Mercedes-Benz to date:

  1. Mercedes-Benz GLE
  2. Mercedes-Benz GLS
  3. Mercedes-Benz C300

Also read: BMW vs Mercedes: (Depreciation Comparison)

  1. Mercedes-Benz GLE

Plenty of things went wrong with the Mercedes GLE. As usual, it had inherent electrical system faults like other German cars. The climate control of the car would malfunction at times. Moreover, some minor problems were reported with the engines of Mercedes GLE as well.

  1. Mercedes-Benz GLS

Mercedes GLS was not only the least reliable car in the Mercedes lineup but it was also the least reliable car in the SUV category. Consumer surveys awarded 1 out of 5 stars for reliability to Mercedes GLS. The reason being its overly complex wiring and engine defects.

  1. Mercedes-Benz C300

A bundle of complaints were launched about the Mercedes C300. Which makes it the least reliable car after 100k miles. It had a faulty steering lock mechanism. Plus the soundproofing of this car was very bad. You would hear a lot of engine and road noise in the cabin.

Is it Worth Buying a Mercedes After 100k Miles?

The answer is no. They are costly to maintain. You shouldn’t ever finance a Mercedes-Benz, BMW, or other luxury vehicles with high mileage. People trade in high-mileage autos that they have had for less than six months.

A Mercedes-Benz pre-owned vehicle with 50,000 miles on it is generally a good buy as long as it runs smoothly. However, if you need to squeeze years out of a car with more than 100,000 miles on it, you’ll want to look at it more closely before buying it.

Regardless of how high your expectations for a certain make or model are, the most significant component in a high mileage vehicle’s reliability is its maintenance record.


Notably, the Mercedes-Benz 300 series leads the market for vintage luxury cars with over 150,000 miles on the clock, thanks to its timeless elegance and long production run.

So, when looking for a Mercedes pre-owned vehicle, there are several aspects to consider, including what constitutes excellent mileage on a used automobile. While around 100,000 miles seemed to be considered excessive mileage, it no longer signifies your car is nearing the ending of its life.

With careful care, certain automobiles can now live well beyond 100k miles, thanks to technological advancements. As I have outlined in this post, learn everything you have to know about determining what is excellent mileage on a second-hand automobile is.