Used 2020 Mercedes-Benz G-Class for Sale nearJanesville, WI

Compare 2020 Mercedes-Benz G-Class Trims

The G-Class offers a blend of luxury and off-road capability, with the G 550 4MATIC as the most budget-friendly option and the AMG G 63 4MATIC as the performance leader.

• Starting at $99,204
• 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 features without the high price of the AMG variant. It's a great entry point into the G-Class.

• Avg. market price: $99,204 (updated weekly)
• MPG/MPGe: 13 city / 17 hwy
• Inventory: 604 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 without compromise. It's the most popular trim in the lineup.

• Avg. market price: $133,807 (updated weekly)
• MPG/MPGe: 13 city / 15 hwy
• Inventory: 1,493 listings — widest selection in the lineup
• View AMG G 63 4MATIC listings

Trim Recommendations

Most Popular — AMG G 63 4MATIC

With 1,493 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 $99,204 avg market price — below the lineup median of $116,505 — it's the most accessible entry point.

Browse G 550 4MATIC listings

Closing Attribution

These recommendations are based on CarGurus' proprietary market data from October 8, 2026, CarGurus experts' opinions, and generative AI.

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

Prices have softened 4.05% compared to this time last year, making it a favorable time to shop this model year.

There are 655 listings available, which gives you a meaningful pool to compare prices and equipment.

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

The 2020 Mercedes-Benz G-Class earns a 7.17/10 expert rating, and its appeal comes from the way it blends premium materials, serious off-road ability, and a surprisingly capable on-road demeanor.

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

The G-Class is especially compelling if you want a luxury SUV with real character and true off-road credibility, not just the look of one. Its premium interior materials and distinctive old-school presence help it stand apart, while the driving experience is more polished than you might expect from something this rugged.

Trade-offs include poor value for money and a cabin that can feel a little too rugged for the price. The aggressive lane-keep assist is another drawback, since it can intervene too abruptly.

With 34.4% of listings priced 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 its expert evaluation emphasizes that it still has the tools for serious off-roading. That same construction helps explain its tough character, but it also means you should expect a more truck-like ownership experience than in many luxury SUVs.

Its performance notes point to strong straight-line power, standard four-wheel drive, and locking differentials front, center, and rear, which all reinforce its durability-minded setup. The expert evaluation also notes that the G-Class handled backroads and highways well, with precise steering and adaptive suspension helping control body motion.

For maintenance, Mercedes includes the first scheduled maintenance visit as part of the ownership experience.

For used buyers, the long-term risk is that this kind of high-priced, highly specialized SUV can be expensive to keep in top shape if prior owners skipped maintenance or used it hard off-road.

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

Accident-free inventory is solid at 78% — always verify the vehicle history report.

You should still check the history report carefully, because a rugged SUV like this may have seen harder use than a typical luxury vehicle. Prioritize a pre-purchase inspection that focuses on suspension, drivetrain, and any signs of off-road wear. Pay close attention to interior condition too, since the cabin is a major part of what you are paying for.

Key things to evaluate:

• Trim level: The base G550 gives you standard leather upholstery, heated front and rear seats, three-zone automatic climate control, and 64-color ambient lighting, while the AMG Line package adds flared wheel arches and a front push bar.
• Powertrain: The G550 uses a 4.0-liter twin-turbocharged V8 with 416 horsepower and 450 pound-feet of torque, while the AMG G63 uses a souped-up twin-turbo V8 with 577 hp and 627 lb-ft of torque.
• Safety package: The standard suite 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 can tighten the seatbelts, close windows, and adjust the front-passenger seat, and Pre Safe Sound plays pink noise.
• Infotainment: You get a 12.3-inch infotainment display, Apple CarPlay/Android Auto, Bluetooth, and SiriusXM satellite radio. An optional second 12.3-inch digital instrument screen is available, and the system does not use a touchscreen.
• Fuel efficiency: The EPA rates the G550 at 13 mpg city, 17 highway, and 14 combined.

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 with the standard twin-turbo V8, four-wheel drive, locking differentials, and the full luxury cabin treatment. It gives you the distinctive look and serious capability without paying extra for the AMG performance jump.
• AMG G63: Choose this if you want the most powerful version and are willing to pay for the extra performance and exclusivity. It is the more expensive, more extreme option, but the G550 is the smarter buy for most shoppers.

The safety package is strong across the lineup, with adaptive cruise control, automatic emergency braking, lane-keep assist, blind-spot monitoring, parking assist, and a driver-attention monitor.

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

This is a moderate market for selective buyers, so it pays to compare listings carefully and move quickly on the right one.

• Deal availability: 34.4% of listings are priced as good or great deals.
• Inventory: There are 655 listings available.
• Price trend: Prices have softened 4.05% compared with last year.
• Clean inventory: 78.0% of listings are accident-free.

If you find a listing below $120,374, 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 $120,374 sits slightly below last year's $125,458.

That decline suggests the market has eased a bit, which can help you buy more confidently today. If you plan to sell later, the G-Class's distinctive appeal should help it hold attention, but its high running costs and niche character can narrow the buyer pool.

For a future seller, the key is condition and documentation. A clean history, strong maintenance records, and well-kept cosmetics should matter more here than on a mainstream SUV.

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 or National Highway Traffic Safety Administration.

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

The standard driver-assistance suite includes adaptive cruise control with stop-and-go, automatic emergency braking, lane-keep assist, blind-spot monitoring, parking assist, and a driver-attention monitor. Mercedes also includes Pre Safe, which tightens the seatbelts, closes the windows, and adjusts the front-passenger seat, plus Pre Safe Sound to help limit hearing damage.

One caveat is that lane-keep assist had a few false alarms and could intervene too aggressively.

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:

• 34.4% of listings are priced as good or great deals.
• Accident-free inventory is solid at 78% — always verify the vehicle history report.
• Price trend: Prices have softened 4.05% compared with last year.
• It blends rugged character with luxury and true off-road capability.

Consider the 2019 if:

• At $104,319, the 2019 costs less than the current year's $120,374 average.
• It delivers the redesigned G-Class formula with strong luxury appeal.

Consider the 2021 if:

• At $136,301, the 2021 costs more than the current year's $120,374 average.
• It adds a more modern luxury feel with strong power and off-road appeal.

The bottom line: If you want the best balance of price and the classic G-Class experience, the 2020 is the sweet spot. If you are especially price-sensitive, the 2019 is the value play; if you want to spend more for the newer-year alternative, the 2021 is the step-up path.

These recommendations are based on CarGurus' proprietary market data from October 13, 2026, CarGurus experts' opinions, and generative AI.