Mercedes-Benz GLS-Class trim comparison
2025 Mercedes-Benz GLS-Class GLS 450 4MATIC vs AMG GLS 63
The GLS-Class GLS 450 4MATIC starts at $89,200 while the AMG GLS 63 is $149,500. That $60,300 gap buys 5 meaningful differences.
This trim jump changes the engine from 3.0L I6 mild-hybrid Turbo to 4.0L V8 mild-hybrid Turbo. Everything else is secondary to whether that powertrain difference matters for how you drive.
Start with the GLS 450 4MATIC if the 3.0L I6 mild-hybrid Turbo already feels sufficient for the way you drive. Step up to the AMG GLS 63 only when the 4.0L V8 mild-hybrid Turbo powertrain is the reason you are moving higher in the lineup.
The cleanest way to feel this upgrade is through the payment: about $1062/month more over 60 months, or roughly $63,720 extra all-in once interest is included. The payment only makes sense if that different powertrain matters to the way you actually drive, tow, or live with the vehicle.
Lock one trim, change the other side, and move through exact pair pages without resetting back to the full lineup every time.
Who notices the difference
The higher trim starts to make more sense when you are specifically shopping for the stronger powertrain, not just more trim content.
When both feel the same
Both the GLS 450 4MATIC and AMG GLS 63 share the same 9-speed shiftable automatic transmission and identical wheelbase and body dimensions.
The upgrade math
You are paying $60,300 for 4 measurable differences, which works out to about $15,075 per change.
Key Differences at a Glance
This is the fast read: price, power, efficiency, and the feature flips most likely to change the answer.
Every Difference, Side by Side
This is the full read behind the quick decision signals above: the complete hardware, comfort, and equipment story. 5 specification differences, 1 shared.
Full Specification Comparison
Specifications reflect available data as of early 2025. Confirm details with an authorized dealer before purchasing.
| Spec | GLS 450 4MATIC | AMG GLS 63 |
|---|---|---|
| Pricing | ||
| MSRP | $89,200 | $149,500 |
| Powertrain | ||
| Engine | 3.0L I6 mild-hybrid Turbo | 4.0L V8 mild-hybrid Turbo |
| Horsepower | 375 hp | 603 hp |
| Torque | 369 lb-ft | 627 lb-ft |
| Transmission | 9-speed shiftable automatic | 9-speed shiftable automatic |
| Drivetrain | AWD | AWD |
| Fuel Economy | ||
| City MPG | 19 | 14 |
| Highway MPG | 24 | 18 |
| Combined MPG | 21 | 15 |
| Fuel Tank | 23.8 gal | 23.8 gal |
| Annual Fuel Cost (EPA) | $2,750/yr | No published data |
| Dimensions | ||
| Curb Weight | No published data | 6,019 lbs |
| Wheelbase | 123.4" | 123.4" |
| Length | 205.0" | 206.4" |
| Width | 79.9" | 79.9" |
| Height | 71.8" | 70.2" |
| Warranty | ||
| Bumper-to-Bumper | 4yr/50k | 4yr/50k |
| Powertrain | 4yr/50k | 4yr/50k |
| Corrosion | 4yr/50k | 4yr/50k |
| Roadside Assistance | 4yr/50k | 4yr/50k |
Data sources: licensed third-party automotive data, EPA fueleconomy.gov, NHTSA, and official manufacturer materials. Values marked est. are estimated.
2025 Mercedes-Benz GLS-Class GLS 450 4MATIC vs AMG GLS 63 Questions Shoppers Ask
Use this page for the direct trim answer, then zoom back out to the Mercedes-Benz GLS-Class lineup, the Mercedes-Benz brand hub, the Full-Size SUVs, the how to pick a trim guide, or our mid-trim value research when you need the bigger shopping path behind this one matchup.
How much more does the 2025 GLS-Class AMG GLS 63 cost than the GLS 450 4MATIC?
The AMG GLS 63 starts at $149,500 compared to $89,200 for the GLS 450 4MATIC. That is a $60,300 difference, or approximately $1062/month more on a 60-month loan.
Do the 2025 Mercedes-Benz GLS-Class GLS 450 4MATIC and AMG GLS 63 have the same engine?
No. The GLS 450 4MATIC uses a 3.0L I6 mild-hybrid Turbo (375 hp, 369 lb-ft), while the AMG GLS 63 has the 4.0L V8 mild-hybrid Turbo (603 hp, 627 lb-ft). That is 228 more horsepower. Both pair with the same 9-speed shiftable automatic.
Do the 2025 GLS-Class GLS 450 4MATIC and AMG GLS 63 have the same drivetrain?
Yes. Both come with AWD as standard. The differences between these trims are in features and equipment, not drivetrain.
What warranty does the 2025 Mercedes-Benz GLS-Class come with?
All 2025 Mercedes-Benz GLS-Class trims, including both the GLS 450 4MATIC and AMG GLS 63, come with Mercedes-Benz's standard warranty: 4yr/50k bumper-to-bumper and 4yr/50k powertrain coverage. Warranty does not vary by trim level.
Is the 2025 Mercedes-Benz GLS-Class AMG GLS 63 worth $60,300 more than the GLS 450 4MATIC?
The $60,300 buys the 4.0L V8 mild-hybrid Turbo. If that powertrain matters for how you drive, yes. If not, the GLS 450 4MATIC does the same job for less.
Which 2025 Mercedes-Benz GLS-Class trim gets better fuel economy, the GLS 450 4MATIC or the AMG GLS 63?
The GLS 450 4MATIC is the more efficient of the two at 21 combined MPG, versus 15 for the other trim. That matters most if you are balancing running costs against the extra power, drivetrain, or comfort equipment tied to the pricier trim.
The Full Story Behind This Price Gap
Use the direct answer above for this exact matchup, then use these guides to understand whether you are really looking at a feature step-up, a package shuffle, or the point where the lineup starts changing in a meaningful way.
Is the GLS-Class AMG GLS 63 Worth $60,300 More?
The GLS-Class AMG GLS 63 costs $60,300 more but shares the same drivetrain as the GLS 450 4MATIC. The differences are mostly cosmetic or marginal, so the practical jump is limited.
The Differences You'll Notice Most
Engine changes between these trims: the GLS 450 4MATIC has the 3.0L I6 mild-hybrid Turbo, the AMG GLS 63 the 4.0L V8 mild-hybrid Turbo. That means 228 more horsepower and 258 more lb-ft of torque. That extra power shows up most clearly once you are out of town and asking more of the drivetrain. The cost of that extra capability is roughly 6 fewer combined MPG.
Fuel Economy Comparison
The GLS-Class GLS 450 4MATIC gets 6 more combined MPG. At $3.50/gallon and 12,000 miles/year, that saves roughly $800 per year or $4,000 over five years of ownership.
Bottom Line
$60,300 more for the GLS-Class AMG GLS 63 gets you 4 real differences. At $1,062/month more, the question is whether those specific changes are things you will use regularly.
Trim-Matched Accessories
These add-ons are split by trim intent so the recommendations follow the actual use case, not just the same repeated product block.
Mercedes-Benz GLS-Class GLS 450 4MATIC
Value-trim add-onsThese picks fit the GLS 450 4MATIC best when the goal is covering the daily-use gaps without paying up to the next trim.
Mercedes-Benz GLS-Class AMG GLS 63
Step-up trim add-onsThese picks suit the AMG GLS 63 when you want the accessories to match the nicer cabin, broader utility, or more premium use case.
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Specifications shown combine licensed third-party automotive data with official manufacturer, EPA, and NHTSA source material for the 2025 model year. Actual pricing, features, and availability may vary by region and dealer. Always confirm details with an authorized dealer before making a purchase decision. TrimAtlas is not affiliated with Mercedes-Benz or any dealership.
Page updated 2026-03-18. Verify equipment, pricing, and regional availability with the manufacturer or dealer.