Mercedes-Benz GLS 62·Rivian R1S 66on the MotiveGrid Score·Rivian R1S about $18,501 less over 5 years
The verdict
The 2026 Rivian R1S is the cheaper one to own — roughly $18,501 less over five years, thanks to cheaper insurance.
The Rivian R1S is the stronger all-round pick here — cheaper to own with little given up in return.
Last updated July 2026 · National-average estimates
Mercedes-Benz GLS vs. Rivian R1S
MotiveGrid scores, key specs, and five-year cost comparison: 2026 Mercedes-Benz GLS versus 2026 Rivian R1S.
Metric
Mercedes-Benz GLS
Rivian R1S
MotiveGrid Score
62
66
Cost of Ownership
31
44
Powertrain
63
63
Driver Assistance
70
46
Livability
37
37
Safety
80
97
5-Year Cost to Own
$103,746
$85,245
Depreciation (5-yr)
$44,674
$44,038
Fuel / Energy (5-yr)
$13,363
$4,658
Insurance (5-yr)
$23,630
$18,650
Maintenance (5-yr)
$4,235
$1,705
Tires (5-yr)
$2,150
$2,150
Financing (5-yr)
$13,579
$11,584
Registration (5-yr)
$2,115
$2,460
Starting Price
$90,250
$76,990
Horsepower
375 hp
533 hp
MPG (combined)
22 mpg
—
Electric range
—
270 mi
Cargo volume
17.4 cu ft
104.7 cu ft
Seating
7
7
Towing capacity
7,700 lbs
7,700 lbs
Drivetrain
AWD
AWD
Gas
2026$90,250
MSRP
$90,250
Mo · 5yr
$1,729
$103,746 / 5 years
Best for driver assistance
Electric
2026$76,990
MSRP
$76,990
Mo · 5yr
$1,421
$85,245 / 5 years
Best for long-term savings
VS
01 · The MotiveGrid Score
Five measured pillars, weighted into one score.
Cost, Powertrain, Driver Assistance, Livability, and Safety — each scored against its class, then combined into a single MotiveGrid Score. Built by our engineering team and benchmarked against independent sources like NHTSA, IIHS, and CarEdge. How it’s calculated →
Rivian R1S scores higher overall.
Mercedes-Benz GLS
0
/ 100
Rivian R1S
0
/ 100
CostFive-year all-in cost to own, benchmarked against the class median.
GLS
31
R1S
44
Winner: R1S
$18,501 cheaper / 5 yrs
Low maintenance cost▲
PowertrainEnergy efficiency paired with long-term ownership confidence.
GLS
63
R1S
63
Evenly matched
Driver AssistHighway driving support, parking convenience, and hands-free automation.
GLS
70
R1S
46
Winner: GLS
+24 pts
Strong highway driving support▲
Automated parking▲
LivabilityPassenger space, cargo room, and everyday maneuverability.
GLS
37
R1S
37
Evenly matched
SafetyCrash-test protection plus standard crash-avoidance features.
Rivian R1S is the better pick for long-term ownership — about $18,501 cheaper over 5 years with stronger fundamentals on running cost.
Mercedes-Benz GLS still wins if your priority is best for driver assistance.
Daily commuter
Rivian R1S
Lowest energy cost per mile
Budget-focused
Rivian R1S
Cheapest to own across 5 years
Family hauler
Rivian R1S
Much stronger safety with substantially more cargo room
Highway driver
Mercedes-Benz GLS
Better adaptive cruise + lane keep
City driver
Mercedes-Benz GLS
Easiest to park and maneuver in tight spots
03
Cost of Ownership
Monthly running costs — national baseline.
Adjust for your situation
State
Miles/yr15,000
Loan rate7%
Down payment20%
Charging mix
Mercedes-Benz GLS
Monthly · 5-Year avg
$1,729
$103,746 total / 5 years
Total · monthly$1,729/mo
Rivian R1S
Monthly · 5-Year avg
$1,421
$85,245 total / 5 years
Total · monthly$1,421/mo
04
Frequently asked questions
Rivian R1S comes out about $18,501 cheaper over 5 years on running costs (depreciation, fuel/energy, insurance, maintenance, financing). The gap shifts with your state, annual miles, and loan rate — use the "Adjust for your situation" panel above.