Used 2020 Mercedes-Benz G-Class for Sale nearSaint Louis, MO

Compare 2020 Mercedes-Benz G-Class Trims

The G-Class offers a blend of luxury and off-road capability, with the AMG G 63 4MATIC as the standout performer.

• Starting at $98,580
• Best MPG/MPGe: 13 city / 17 hwy
• Most Popular: AMG G 63 4MATIC

Trim Overview

Prices updated weekly from CarGurus listings.

Quick Compare Table

Listing prices sourced from CarGurus — updated weekly. OEM specs from manufacturer data.

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Trim Deep Dives

G 550 4MATIC — "Who It's For"

The G 550 4MATIC is the pick for shoppers who want luxury and capability without the higher price of the AMG variant.

• Avg. market price: $98,580 (updated weekly)
• MPG/MPGe: 13 city / 17 hwy
• Inventory: 638 listings
• View G 550 4MATIC listings

AMG G 63 4MATIC — "Who It's For"

The AMG G 63 4MATIC is the pick for shoppers who want top-tier performance and luxury features in a rugged package.

• Avg. market price: $135,922 (updated weekly)
• MPG/MPGe: 13 city / 15 hwy
• Inventory: 1,569 listings — widest selection in the lineup
• View AMG G 63 4MATIC listings

Trim Recommendations

Most Popular — AMG G 63 4MATIC

With 1,569 active listings, the AMG G 63 4MATIC is the clear volume leader in the lineup.

Browse AMG G 63 4MATIC listings

Best Budget Option — G 550 4MATIC

At $98,580 avg market price — below the lineup median of $117,251 — it's the most accessible entry point.

Browse G 550 4MATIC listings

These recommendations are based on CarGurus' proprietary market data from September 2, 2026, CarGurus experts' opinions, and generative AI.

How much does the 2020 Mercedes-Benz G-Class cost?

Prices have softened 3.62% compared to this time last year, making it a favorable time to shop this model year.

There are 677 listings available, which gives you a meaningful amount of inventory to compare.

Is the 2020 Mercedes-Benz G-Class a good car?

The 2020 Mercedes-Benz G-Class earns a 7.17/10 expert rating.

The standout strength is Look and feel at 9/10.

The G-Class stands out because it blends ruggedness and luxury in a way few SUVs can match, and it keeps much of the old G-Wagen character while adding modern Mercedes polish. That makes it especially appealing if you want premium materials, true off-road capability, and a vehicle with a distinctive personality.

The trade-offs are clear: it is poor value for money, and it can feel a little too rugged for the money. It also has a few usability compromises, including an infotainment setup that can be confusing and slow to respond.

With 31.0% of listings marked as good or great deals, you have some room to shop selectively.

Is the 2020 Mercedes-Benz G-Class reliable?

The 2020 Mercedes-Benz G-Class is built around a rugged, body-on-frame design and standard four-wheel drive, which supports its tough, go-anywhere character. Its expert notes also point to strong off-road hardware, including low range and locking differentials, plus a chassis that handled backroads and highways better than you might expect from something this tall and heavy.

On the dependability side, the expert notes describe the driver-assistance features as generally performing well, though lane-keep assist had a few false alarms. The G-Class also includes a Pre Safe system that tightens seatbelts, closes windows, and adjusts the front-passenger seat if a crash seems imminent.

Mercedes also includes a Pre Safe Sound function, and the G-Class comes with a long list of standard safety features. For used buyers, the main long-term ownership risk is that its complexity and six-figure positioning can make repairs and upkeep expensive if something goes wrong.

What should I look for when buying a used 2020 Mercedes-Benz G-Class?

Accident-free inventory is solid at 78.6% — always verify the vehicle history report.

You should still check the vehicle history report carefully, because a clean listing percentage does not replace a proper records review. Prioritize a pre-purchase inspection that focuses on the suspension, electronics, and any signs of hard use. Given the G-Class’s rugged mission and luxury cabin, condition matters as much as mileage.

Key things to evaluate:

• Trim level: The cabin is defined by standard leather upholstery, heated front and rear seats, three-zone automatic climate control, and 64-color ambient lighting, while available upgrades include Nappa leather, wood or carbon fiber trim, a heated steering wheel, and massaging front seats.
• Powertrain: The standard setup uses a 4.0-liter twin-turbocharged V8 with 416 horsepower and 450 pound-feet of torque, while the AMG G63 uses a more powerful twin-turbo V8 with 577 hp and 627 lb-ft of torque. Four-wheel drive and a nine-speed automatic are standard.
• Safety package: Standard driver assistance includes adaptive cruise control with stop-and-go, automatic emergency braking, lane-keep assist, blind-spot monitoring, parking assist, and a driver-attention monitor. Pre Safe adds crash-prep functions, but lane-keep assist can be overly aggressive.
• Infotainment: You get a 12.3-inch infotainment display, Apple CarPlay, Android Auto, Bluetooth, and SiriusXM satellite radio. A second 12.3-inch digital instrument screen is available, and the system does not use a touchscreen.
• Fuel efficiency: The G550 is rated at 13 mpg city, 17 highway, and 14 combined. The AMG G63 gets 13 mpg city and 15 highway.

Which 2020 Mercedes-Benz G-Class trim should I buy?

The 2020 Mercedes-Benz G-Class is offered in 2 trim levels: G550, AMG G63.

Here's the short version:

• G550: This is the better-value choice if you want the core G-Class experience without paying extra for the AMG badge. It still gives you the twin-turbo V8, standard four-wheel drive, serious off-road hardware, and the full luxury cabin, so it covers the essentials well.
• AMG G63: Choose this if you want the most powerful and most expensive version, along with the extra performance character that comes with the AMG tune. It is the right pick if you care more about maximum presence and acceleration than value.

The safety package is broad across the lineup, but lane-keep assist can be overly aggressive.

Is now a good time to buy a used 2020 Mercedes-Benz G-Class?

This is a moderate market for selective buyers, so you can shop carefully and still find worthwhile listings.

• Deal availability: 31.0% of listings are priced as good or great deals.
• Inventory: There are 677 listings available.
• Price trend: Prices have softened 3.62% compared with last year.
• Clean inventory: 78.6% of listings are accident-free.

If you find a listing below $121,505, that's toward the low end of the year-round range and worth acting on quickly.

What is the 2020 Mercedes-Benz G-Class's resale value?

The current average of $121,975 sits slightly below last year's $126,555.

That decline suggests the market has eased a bit, which can help you buy more confidently now. If you sell later, the current pricing trend may limit upside compared with a stronger market, but the G-Class still sits in a high-price segment where condition and equipment matter a lot.

For a future seller, the best outcome will likely come from a well-kept example with clean history and desirable equipment. A strong condition report should matter more than trying to time a small price swing.

Is the 2020 Mercedes-Benz G-Class safe?

The 2020 G-Class hasn’t received crash-test ratings from the Insurance Institute for Highway Safety (IIHS) or National Highway Traffic Safety Administration (NHTSA).

It earns a 7/10 safety score from our experts.

The G-Class gets adaptive cruise control with stop-and-go, automatic emergency braking, lane-keep assist, blind-spot monitoring, parking assist, and a driver-attention monitor. It also includes Pre Safe, which tightens the seatbelts, closes windows, and adjusts the front-passenger seat if a collision seems likely.

One caveat is that lane-keep assist had a few false alarms and could intervene too aggressively. That means you should pay attention to how the system behaves on your test drive, especially if you plan to use it often.

Should I buy a 2020 Mercedes-Benz G-Class or consider a different year?

If you're weighing the 2020 against nearby model years, here's how to think about it:

Choose the 2020 if:

• 31.0% of listings are priced as good or great deals.
• Accident-free inventory is solid at 78.6% — always verify the vehicle history report.
• Price trend: Prices have softened 3.62% compared with last year.
• The 2020 keeps the G-Class’s rugged character while pairing it with modern Mercedes luxury and strong off-road hardware.

Consider the 2019 if:

• At $105,414, the 2019 costs less than the current year's $121,975 average.
• It delivers the redesigned G-Class experience with a more modern feel.

Consider the 2021 if:

• At $137,485, the 2021 costs more than the current year's $121,975 average.
• It adds a more sophisticated powertrain and technology package.

The bottom line: If you want the best balance of price, inventory, and the G-Class’s signature personality, the 2020 is the sensible default. If you are especially price-sensitive, the 2019 is the better value path, while the 2021 makes sense only if you want to spend more for the newer-year premium.

These recommendations are based on CarGurus' proprietary market data from September 11, 2026, CarGurus experts' opinions, and generative AI.