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Cadillac OPTIQ vs Mercedes-Benz G-Class

2026 Cadillac OPTIQ vs 2026 Mercedes-Benz G-Class — two standard SUVs compared on efficiency, size, safety and reliability.

Cadillac OPTIQ

2026 Cadillac OPTIQ

Standard Sport Utility Vehicle 2WDAWD/4WDHybrid/EV
VS2 – 3Mercedes-Benz G-Class wins 3 of 5 categories
Mercedes-Benz G-Class

2026 Mercedes-Benz G-Class

Standard Sport Utility Vehicle 4WDAWD/4WDHybrid/EV

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The short version

That works out to about $500 a year less in fuel for the Cadillac OPTIQ (EPA estimate, 15,000 miles).

The Cadillac OPTIQ is the bigger car, about 8 inches longer.

Across all model years since 2005, the Mercedes-Benz G-Class has had fewer recall campaigns (0 vs 3).

The two cars

The 2026 Cadillac OPTIQ is a standard SUV powered by electricity and rear-wheel drive and all-wheel drive. It measures about 190 inches long and 75 inches wide on a 116-inch wheelbase, with a curb weight of roughly 5,203 lb.

The 2026 Mercedes-Benz G-Class is a standard SUV offered with 2 engines (3.0L 6-cyl turbo and 4.0L 8-cyl turbo), including a hybrid version and 4-wheel drive. It measures about 182 inches long and 76 inches wide on a 114-inch wheelbase, with a curb weight of roughly 5,479 lb (550 4dr SUV).

Basics

Standard Sport Utility Vehicle 2WD
Class
Standard Sport Utility Vehicle 4WD
EV
Fuel
EV, Hybrid
EV
Engines
3.0L 6-cyl turbo, 4.0L 8-cyl turbo
Rear-Wheel Drive, All-Wheel Drive
Drivetrain
4-Wheel Drive

Efficiency

–
Best combined MPG
18 MPG
–
City / highway MPG (best)
17 city
317 mi
EV range
239 mi
$700
Fuel cost per year (EPA)
$1,200

Performance & space

189.8 in
Length
181.9 in
75.2 in
Width
76 in
64.6 in
Height
77.6 in
5,203 lb
Curb weight (lightest)
5,479 lb

Safety & reliability

15
Driver-assist features standard
–
3
Recalls (2026)
0
3
Recalls, all years since 2005
0
6
Owner complaints (latest year)
0

Interest

2,630
Wikipedia views, 30 days
40,177

Buying used

–
Best used year
2024
–
Year to avoid
–

Green = clearly better. Prices are not included. How we calculate this →

Which one should you choose?

Choose the Cadillac OPTIQ if…

  • You want an EV with more range (317 miles)
  • You want more room (8 in longer)

Choose the Mercedes-Benz G-Class if…

  • You want something easier to park (8 in shorter)

Pros & cons of each

2026 Cadillac OPTIQ

  • Long EV rangeUp to 317 miles on a charge (EPA).
  • AWD / 4WD available
  • Lots of standard safety tech5 of 5 key driver aids standard on the versions we checked.

2026 Mercedes-Benz G-Class

  • Hybrid version availableOffered as a hybrid and electric as well as gas.
  • Premium fuel requiredEvery gasoline version is rated for premium, which raises running costs.

Full 2026 Cadillac OPTIQ specs →Full 2026 Mercedes-Benz G-Class specs →Compare fuel costs for your driving →Compare size & garage fit →