Car comparison

Mercedes-Benz GLS (X166) GLS 350dvsMercedes-Benz X-class X 350d V6

Compare specs, acceleration, fuel consumption, dimensions, practicality, and estimated running costs side by side.

New comparison

Mercedes-Benz GLS (X166)

GLS 350d

258 hp2987 ccDieselAWDAutomaticTurbochargedSUV2015-2019

Mercedes-Benz X-class

X 350d V6

258 hp2987 ccDieselAWDAutomaticTurbochargedPickup2018-2020

Comparison overview

Use the estimates as comparison hints and verify exact figures before making decisions.

Mercedes-Benz GLS (X166) GLS 350d

Quickest 0-100 km/h
7.8 s
Fastest top speed
222 km/h
138 mph
Most powerful
258 hp
192 kW
Highest torque
620 Nm
457 lb-ft
Lowest combined fuel consumption
7.6 L/100 km
30.9 mpg US
37.2 mpg UK
Lowest city consumption
8.2 L/100 km
28.7 mpg US
34.4 mpg UK
Lowest highway consumption
7.2 L/100 km
32.7 mpg US
39.2 mpg UK
Lowest CO2 emissions
199 g/km
Best estimated range
1,316 km
818 mi
Best overall score
66/100
Best performance score
54/100
Best economy score
86/100
Best practicality score
93/100

Mercedes-Benz X-class X 350d V6

Lightest
2,259 kg
4,980 lb
Best power-to-weight
114 hp/t
85 kW/t
8.8 kg/hp

Specification comparison

Specification comparison
Model	Mercedes-BenzGLS (X166)GLS 350d	Mercedes-BenzX-classX 350d V6
Power	258hp192kW	258hp192kW
Torque	620Nm457lb-ft	550Nm406lb-ft
Curb weight	2,380kg5,247lb	2,259kg4,980lb
Gross weight	3,250kg7,165lb	3,250kg7,165lb
Top speed	222 km/h 138 mph	205 km/h 127 mph
To 99% top speed	104.7s99% target: 220 km/h / 137 mph Calculated	111.9s99% target: 203 km/h / 126 mph Calculated
0-100 km/h	7.8s	7.9s
0-200 km/h	43.6s Calculated	83.3s Calculated
0-60 mph	7.3s Calculated	7.4s Calculated
Fuel consumption	7.6L/100 km30.9mpg US37.2mpg UK	9L/100 km26.1mpg US31.4mpg UK
Fuel consumption city	8.2L/100 km28.7mpg US34.4mpg UK	10.2L/100 km23.1mpg US27.7mpg UK
Fuel consumption highway	7.2L/100 km32.7mpg US39.2mpg UK	8.3L/100 km28.3mpg US34.0mpg UK
Quarter mile	15.7s Calculated	15.8s Calculated
Power-to-weight	108hp/t81kW/t49hp/1000 lb Calculated	114hp/t85kW/t52hp/1000 lb Calculated
Torque-to-weight	261Nm/t174lb-ft/ton Calculated	243Nm/t163lb-ft/ton Calculated
Estimated range	1,316km818mi Calculated	811km504mi Calculated
Displacement	2,987cc182cu in	2,987cc182cu in
Length	5,130mm202in	5,340mm210in
Width	1,934mm76in	1,920mm76in
Height	1,850mm73in	1,819mm72in
Wheelbase	3,075mm121in	3,150mm124in
Front track	1,655mm65in	1,632mm64in
Rear track	1,675mm66in	1,625mm64in
Ground clearance	-	202mm8in
Trunk volume	680L	-
Max trunk volume	2,300L	-
Doors	5	4
Seats	5	5
Fuel tank	100L	73L
CO2 emissions	199g/km	237g/km

Performance charts

Use the estimates as comparison hints and verify exact figures before making decisions.

Dyno simulation

Estimated stock-style power and torque curves by engine speed.

Mercedes-Benz GLS (X166) GLS 350dMercedes-Benz X-class X 350d V6PowerTorque

Dyno simulation data table
Vehicle	Peak power RPM	Peak torque RPM	Max engine speed
Mercedes-BenzGLS (X166)GLS 350d	3,400 rpm	1,600-2,400 rpm	3,650 rpm
Mercedes-BenzX-classX 350d V6	3,400 rpm	1,400-3,200 rpm	3,650 rpm

Acceleration curve

Estimated speed over time for selected vehicles.

Acceleration and drag-race table
Metric	Mercedes-BenzGLS (X166)GLS 350d	Mercedes-BenzX-classX 350d V6
	Acceleration checkpoints
0-60 mph 0-97 km/h	7.3 s	7.4 s
0-100 km/h 0-62 mph	7.8 s	7.9 s
0-200 km/h 0-124 mph	43.6 s	83.3 s
Top speed	222 km/h 138 mph	205 km/h 127 mph
	Drag race simulation
60 ft 18 m	2.4 s	2.3 s
330 ft 101 m	6.6 s	6.4 s
1/8 mile 201 m	10.1 s	10.0 s
1000 ft 305 m	13.1 s	13.1 s
1/4 mile 402 m	15.7 s	15.8 s
Trap speed 1/4 mile 402 m	143 km/h 89 mph	137 km/h 85 mph

Power comparison

Bar comparison chart for Power. Higher is better · hp / kW

Chart data table
Vehicle	Value
Mercedes-BenzGLS (X166)GLS 350d	258 hp 192 kW
Mercedes-BenzX-classX 350d V6	258 hp 192 kW

Torque comparison

Bar comparison chart for Torque. Higher is better · Nm / lb-ft

Chart data table
Vehicle	Value
Mercedes-BenzGLS (X166)GLS 350d	620 Nm 457 lb-ft
Mercedes-BenzX-classX 350d V6	550 Nm 406 lb-ft

Curb weight comparison

Bar comparison chart for Curb weight. Lower is better · kg / lb

Chart data table
Vehicle	Value
Mercedes-BenzGLS (X166)GLS 350d	2,380 kg 5,247 lb
Mercedes-BenzX-classX 350d V6	2,259 kg 4,980 lb

Top speed without limiter comparison

Bar comparison chart for Top speed without limiter. Higher is better · km/h / mph

Chart data table
Vehicle	Value
Mercedes-BenzGLS (X166)GLS 350d	222 km/h 138 mph
Mercedes-BenzX-classX 350d V6	205 km/h 127 mph

0-100 km/h comparison

Bar comparison chart for 0-100 km/h. Lower is better · seconds

Chart data table
Vehicle	Value
Mercedes-BenzGLS (X166)GLS 350d	7.8 s
Mercedes-BenzX-classX 350d V6	7.9 s

The biggest 0-100 km/h difference is between Mercedes-Benz GLS (X166) GLS 350d and Mercedes-Benz X-class X 350d V6: 0.1 s.

Fuel consumption comparison

Bar comparison chart for Fuel consumption. Lower is better · L/100 km / mpg US / mpg UK

Chart data table
Vehicle	Value
Mercedes-BenzGLS (X166)GLS 350d	7.6 L/100 km 30.9 mpg US 37.2 mpg UK
Mercedes-BenzX-classX 350d V6	9.0 L/100 km 26.1 mpg US 31.4 mpg UK

The biggest fuel consumption difference is between Mercedes-Benz GLS (X166) GLS 350d and Mercedes-Benz X-class X 350d V6: 1.4 L/100 km.

Power-to-weight comparison

Bar comparison chart for Power-to-weight. Higher is better · hp/t / kW/t

Chart data table
Vehicle	Value
Mercedes-BenzGLS (X166)GLS 350d	108 hp/t 81 kW/t 9.2 kg/hp
Mercedes-BenzX-classX 350d V6	114 hp/t 85 kW/t 8.8 kg/hp

Estimated range comparison

Bar comparison chart for Estimated range. Higher is better · km / mi

Chart data table
Vehicle	Value
Mercedes-BenzGLS (X166)GLS 350d	1,316 km 818 mi
Mercedes-BenzX-classX 350d V6	811 km 504 mi

Performance spider chart

Radar chart comparing normalized performance and fuel-consumption scores.

Chart data table
Vehicle	Power	Acceleration	Top speed
Mercedes-BenzGLS (X166)GLS 350d	258 hp 192 kW	7.8 s	222 km/h 138 mph
Mercedes-BenzX-classX 350d V6	258 hp 192 kW	7.9 s	205 km/h 127 mph

Most attractive quadrant

Scatter chart with performance score on the X axis and practicality score on the Y axis.

Vehicle

Performance score

Practicality score

Mercedes-BenzGLS (X166)GLS 350d

Power	258 hp 192 kW
0-100 km/h	7.8 s
Top speed 222 km/h 138 mph

Doors/seats	5 doors 5 seats
Trunk	680 L 24.0 cu ft
Length	5,130 mm 202.0 in
Height	1,850 mm 72.8 in

Mercedes-BenzX-classX 350d V6

Power	258 hp 192 kW
0-100 km/h	7.9 s
Top speed 205 km/h 127 mph

Doors/seats	4 doors 5 seats
Trunk	-
Length	5,340 mm 210.2 in
Height	1,819 mm 71.6 in

Performance vs fuel economy

Cars closer to the top-right corner combine stronger performance with better fuel economy scores.

Vehicle

Performance score

Fuel economy score

Mercedes-BenzGLS (X166)GLS 350d

Power	258 hp 192 kW
0-100 km/h	7.8 s
Top speed 222 km/h 138 mph

7.6 L/100 km

30.9 mpg US

37.2 mpg UK

Mercedes-BenzX-classX 350d V6

Power	258 hp 192 kW
0-100 km/h	7.9 s
Top speed 205 km/h 127 mph

9.0 L/100 km

26.1 mpg US

31.4 mpg UK

Mercedes-Benz GLS (X166) GLS 350d is closest to the top-right balance target for performance and fuel economy.

Acceleration vs fuel consumption

Cars closer to the lower-left corner offer a better mix of quick acceleration and low fuel consumption.

Acceleration vs fuel consumption data table
Vehicle	Fuel consumption, L/100 km	0-100 km/h, s
Mercedes-BenzGLS (X166)GLS 350d	7.6 L/100 km 30.9 mpg US 37.2 mpg UK	7.8 s
Mercedes-BenzX-classX 350d V6	9.0 L/100 km 26.1 mpg US 31.4 mpg UK	7.9 s

Power-to-weight vs fuel consumption

The shaded area favors higher power-to-weight with lower combined fuel consumption.

Power-to-weight vs fuel consumption data table
Vehicle	Power-to-weight, hp/t	Fuel consumption, L/100 km
Mercedes-BenzGLS (X166)GLS 350d	108 hp/t 81 kW/t 9.2 kg/hp	7.6 L/100 km 30.9 mpg US 37.2 mpg UK
Mercedes-BenzX-classX 350d V6	114 hp/t 85 kW/t 8.8 kg/hp	9.0 L/100 km 26.1 mpg US 31.4 mpg UK

Detailed score breakdown

Vehicle

Mercedes-BenzGLS (X166)GLS 350d

Mercedes-BenzX-classX 350d V6

Power

258 hp

192 kW

258 hp

192 kW

Torque

620 Nm

457 lb-ft

550 Nm

406 lb-ft

Acceleration

7.8 s

7.9 s

Top speed

222 km/h

138 mph

205 km/h

127 mph

Lightness

2,380 kg

5,247 lb

2,259 kg

4,980 lb

Fuel consumption

7.6 L/100 km

30.9 mpg US

37.2 mpg UK

9.0 L/100 km

26.1 mpg US

31.4 mpg UK

Practicality

Doors/seats	5 doors 5 seats
Trunk	680 L 24.0 cu ft
Length	5,130 mm 202.0 in
Height	1,850 mm 72.8 in

Doors/seats	4 doors 5 seats
Trunk	-
Length	5,340 mm 210.2 in
Height	1,819 mm 71.6 in

Range score

1,316 km

818 mi

811 km

504 mi

CO2 score

199 g/km

237 g/km

Trunk score

680 L

24.0 cu ft

Power-to-weight score

108 hp/t

81 kW/t

9.2 kg/hp

114 hp/t

85 kW/t

8.8 kg/hp

Overall

Fixed score

Fuel cost and annual usage

Estimate running costs from combined consumption, your annual distance, and the fuel price in your local currency.

Average annual distanceDistance unitFuel price in your local currencyPrice unit

Enter the fuel price in your local currency, for example €/L, $/gal, £/L or any other local currency.

LC = Local Currency

Fuel cost and annual usage
Vehicle	Mercedes-Benz GLS (X166) GLS 350d	Mercedes-Benz X-class X 350d V6
Consumption	7.6 L/100 km30.9 mpg US37.2 mpg UK	9 L/100 km26.1 mpg US31.4 mpg UK
Cost / 100 km	13.30 LC100 km	15.75 LC100 km
Cost / 100 mi	21.40 LC100 mi	25.35 LC100 mi
Annual fuel used	1,140 L301 US gal251 UK gal	1,350 L357 US gal297 UK gal
Annual fuel cost	1,995 LC/year	2,363 LC/year