How much does the 2018 Mercedes-Benz S-Class cost?

Prices have softened 9.97% compared to this time last year, making it a favorable time to shop this model year.

There are 717 listings available, which gives you a meaningful amount of inventory to compare.

If you find a listing below $33,548.52, that's toward the low end of the year-round range and worth acting on quickly.

Is the 2018 Mercedes-Benz S-Class a good car?

Yes — the 4.79/5 user rating points to strong owner satisfaction. Drivers consistently praise the luxurious interior, advanced technology, and smooth performance, and they also highlight the high-quality craftsmanship and spacious cabin. For you, that means this model fits especially well if you want a full-size luxury sedan that emphasizes comfort, refinement, and a premium feel. 33.1% of listings are priced as good or great deals, so there is still room to shop selectively.

Is the 2018 Mercedes-Benz S-Class reliable?

Owners rate it 4.79/5, a strong signal of long-term satisfaction.

Drivers describe the car as smooth, refined, and satisfying to live with, with the kind of craftsmanship and comfort that tends to support confidence over time. The owner feedback also points to a generally dependable ownership experience, even with the car’s luxury complexity. For used buyers, the main long-term risk is less about basic satisfaction and more about the cost of keeping a sophisticated flagship sedan in top condition.

What should I look for when buying a used 2018 Mercedes-Benz S-Class?

At 63.5% accident-free, a meaningful share of listings has prior incidents — history verification is especially important.

You should start with a vehicle history report so you can separate clean examples from cars with prior damage or repeated claims. After that, prioritize a thorough pre-purchase inspection, especially on a luxury sedan where repairs can be expensive if something has been overlooked. Focus your attention on overall condition, maintenance evidence, and whether the car’s wear matches its asking price.

Is now a good time to buy a used 2018 Mercedes-Benz S-Class?

This is a moderate market for selective buyers, so you can shop with some leverage if you stay disciplined.

• Deal availability: 33.1% of listings are priced as good or great deals.
• Inventory: There are 717 listings available.
• Price trend: Prices have softened 9.97% compared with last year.
• Clean inventory: 63.5% of listings are accident-free.

If you find a listing below $33,548.52, that's toward the low end of the year-round range and worth acting on quickly.

What is the 2018 Mercedes-Benz S-Class's resale value?

The current average of $33,469 sits slightly below last year's $37,175.

That softer pricing suggests the model has already absorbed a meaningful amount of depreciation, which can help future resale stability if you buy at the right number. If you pay close attention to condition and avoid overpaying, you may have a better chance of limiting your loss when it is time to sell. Strong demand for well-kept luxury sedans can still support value, especially when the car has a strong reputation with owners.

Vehicles with strong owner satisfaction ratings, like this model year's 4.79/5, tend to retain buyer demand, which supports resale value over time.

Should I buy a 2018 Mercedes-Benz S-Class or consider a different year?

If you're weighing the 2018 against nearby model years, here's how to think about it:

Choose the 2018 if:

• 33.1% of listings are priced as good or great deals.
• At 63.5% accident-free, a meaningful share of listings has prior incidents — history verification is especially important.
• Price trend: Prices have softened 9.97% compared with last year.
• Owners rate it 4.79/5 — a strong satisfaction signal.

The bottom line: You should start with the 2018 if you want a flagship luxury sedan with strong owner approval and a market that has become more favorable than it was a year ago. If your priority is stretching your budget, a different year may be worth comparing, but the 2018 remains a compelling choice when you find a clean, well-priced example.

These recommendations are based on CarGurus' proprietary market data from August 21, 2026, CarGurus experts' opinions, and generative AI.