Car comparison

Mercedes-Benz GLS (X166) GLS 350dvsMercedes-Benz GLK (X204) GLK 300 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
VS

Mercedes-Benz GLK (X204)

GLK 300 V6

231 hp2996 ccGasolineAWDAutomaticNaturally aspiratedSUV2009-2011

Comparison overview

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

Best choices

Mercedes-Benz GLS (X166) GLS 350d

  • 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
  • Best estimated range
    1,316 km
    818 mi
  • Largest trunk
    680 L
  • Best overall score
    66/100
  • Best performance score
    54/100
  • Best economy score
    86/100
  • Best practicality score
    93/100

Specification comparison

Specification comparison
ModelMercedes-BenzGLS (X166)GLS 350dMercedes-BenzGLK (X204)GLK 300 V6
Power
258hp192kW
231hp172kW
Torque
620Nm457lb-ft
300Nm221lb-ft
Curb weight
2,380kg5,247lb
1,755kg3,869lb
Gross weight
3,250kg7,165lb
2,480kg5,467lb
Top speed
222 km/h
138 mph
210 km/h
130 mph
To 99% top speed
104.7s99% target: 220 km/h / 137 mph
Calculated
80.9s99% target: 208 km/h / 129 mph
Calculated
0-100 km/h
7.8s
7.6s
0-200 km/h
43.6s
Calculated
49.1s
Calculated
0-60 mph
7.3s
Calculated
7.2s
Calculated
Fuel consumption
7.6L/100 km30.9mpg US37.2mpg UK
10.5L/100 km22.4mpg US26.9mpg UK
Fuel consumption city
8.2L/100 km28.7mpg US34.4mpg UK
14.1L/100 km16.7mpg US20.0mpg UK
Fuel consumption highway
7.2L/100 km32.7mpg US39.2mpg UK
8.4L/100 km28mpg US33.6mpg UK
Quarter mile
15.7s
Calculated
15.5s
Calculated
Power-to-weight
108hp/t81kW/t49hp/1000 lb
Calculated
132hp/t98kW/t60hp/1000 lb
Calculated
Torque-to-weight
261Nm/t174lb-ft/ton
Calculated
171Nm/t114lb-ft/ton
Calculated
Estimated range
1,316km818mi
Calculated
629km391mi
Calculated
Displacement
2,987cc182cu in
2,996cc183cu in
Length
5,130mm202in
4,528mm178in
Width
1,934mm76in
1,840mm72in
Height
1,850mm73in
1,689mm66in
Wheelbase
3,075mm121in
2,755mm108in
Front track
1,655mm65in
1,567mm62in
Rear track
1,675mm66in
1,569mm62in
Ground clearance-
201mm8in
Trunk volume
680L
450L
Max trunk volume
2,300L
1,550L
Doors
5
5
Seats
5
5
Fuel tank
100L
66L
CO2 emissions
199g/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 GLK (X204) GLK 300 V6PowerTorque
  • Mercedes-Benz GLS (X166) GLS 350d: Power / Torque
  • Mercedes-Benz GLK (X204) GLK 300 V6: Power / Torque
Dyno simulation data table
VehiclePeak power RPMPeak torque RPMMax engine speed
Mercedes-BenzGLS (X166)GLS 350d3,400 rpm1,600-2,400 rpm3,650 rpm
Mercedes-BenzGLK (X204)GLK 300 V66,000 rpm2,500-5,000 rpm6,250 rpm

Acceleration curve

Estimated speed over time for selected vehicles.

Acceleration and drag-race table
MetricMercedes-BenzGLS (X166)GLS 350dMercedes-BenzGLK (X204)GLK 300 V6
Acceleration checkpoints
0-60 mph
0-97 km/h
7.3 s
7.2 s
0-100 km/h
0-62 mph
7.8 s
7.6 s
0-200 km/h
0-124 mph
43.6 s
49.1 s
Top speed
222 km/h
138 mph
210 km/h
130 mph
Drag race simulation
60 ft
18 m
2.4 s
2.5 s
330 ft
101 m
6.6 s
6.6 s
1/8 mile
201 m
10.1 s
10.1 s
1000 ft
305 m
13.1 s
13.0 s
1/4 mile
402 m
15.7 s
15.5 s
Trap speed
1/4 mile
402 m
143 km/h
89 mph
145 km/h
90 mph

Power comparison

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

Chart data table
VehicleValue
Mercedes-BenzGLS (X166)GLS 350d
258 hp
192 kW
Mercedes-BenzGLK (X204)GLK 300 V6
231 hp
172 kW

Mercedes-Benz GLS (X166) GLS 350d has 27 hp more than Mercedes-Benz GLK (X204) GLK 300 V6.

The biggest power difference is between Mercedes-Benz GLK (X204) GLK 300 V6 and Mercedes-Benz GLS (X166) GLS 350d: 27 hp (20 kW).

Torque comparison

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

Chart data table
VehicleValue
Mercedes-BenzGLS (X166)GLS 350d
620 Nm
457 lb-ft
Mercedes-BenzGLK (X204)GLK 300 V6
300 Nm
221 lb-ft

Curb weight comparison

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

Chart data table
VehicleValue
Mercedes-BenzGLS (X166)GLS 350d
2,380 kg
5,247 lb
Mercedes-BenzGLK (X204)GLK 300 V6
1,755 kg
3,869 lb

Top speed without limiter comparison

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

Chart data table
VehicleValue
Mercedes-BenzGLS (X166)GLS 350d
222 km/h
138 mph
Mercedes-BenzGLK (X204)GLK 300 V6
210 km/h
130 mph

0-100 km/h comparison

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

Chart data table
VehicleValue
Mercedes-BenzGLS (X166)GLS 350d7.8 s
Mercedes-BenzGLK (X204)GLK 300 V67.6 s

Although Mercedes-Benz GLS (X166) GLS 350d has more power, Mercedes-Benz GLK (X204) GLK 300 V6 is quicker from 0-100 km/h.

The biggest 0-100 km/h difference is between Mercedes-Benz GLK (X204) GLK 300 V6 and Mercedes-Benz GLS (X166) GLS 350d: 0.2 s.

Fuel consumption comparison

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

Chart data table
VehicleValue
Mercedes-BenzGLS (X166)GLS 350d
7.6 L/100 km
30.9 mpg US
37.2 mpg UK
Mercedes-BenzGLK (X204)GLK 300 V6
10.5 L/100 km
22.4 mpg US
26.9 mpg UK

The biggest fuel consumption difference is between Mercedes-Benz GLS (X166) GLS 350d and Mercedes-Benz GLK (X204) GLK 300 V6: 2.9 L/100 km.

Power-to-weight comparison

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

Chart data table
VehicleValue
Mercedes-BenzGLS (X166)GLS 350d
108 hp/t
81 kW/t
9.2 kg/hp
Mercedes-BenzGLK (X204)GLK 300 V6
132 hp/t
98 kW/t
7.6 kg/hp

Estimated range comparison

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

Chart data table
VehicleValue
Mercedes-BenzGLS (X166)GLS 350d
1,316 km
818 mi
Mercedes-BenzGLK (X204)GLK 300 V6
629 km
391 mi

Performance spider chart

Radar chart comparing normalized performance and fuel-consumption scores.

Chart data table
VehiclePowerAccelerationTop speed
Mercedes-BenzGLS (X166)GLS 350d
258 hp
192 kW
7.8 s
222 km/h
138 mph
Mercedes-BenzGLK (X204)GLK 300 V6
231 hp
172 kW
7.6 s
210 km/h
130 mph

Most attractive quadrant

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

Chart data table
VehiclePerformance scorePracticality score
Mercedes-BenzGLS (X166)GLS 350d
Power
258 hp
192 kW
0-100 km/h7.8 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-BenzGLK (X204)GLK 300 V6
Power
231 hp
172 kW
0-100 km/h7.6 s
Top speed
210 km/h
130 mph
Doors/seats
5 doors
5 seats
Trunk
450 L
15.9 cu ft
Length
4,528 mm
178.3 in
Height
1,689 mm
66.5 in

Performance vs fuel economy

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

Performance vs fuel economy data table
VehiclePerformance scoreFuel economy score
Mercedes-BenzGLS (X166)GLS 350d
Power
258 hp
192 kW
0-100 km/h7.8 s
Top speed
222 km/h
138 mph
7.6 L/100 km
30.9 mpg US
37.2 mpg UK
Mercedes-BenzGLK (X204)GLK 300 V6
Power
231 hp
172 kW
0-100 km/h7.6 s
Top speed
210 km/h
130 mph
10.5 L/100 km
22.4 mpg US
26.9 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
VehicleFuel consumption, L/100 km0-100 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-BenzGLK (X204)GLK 300 V6
10.5 L/100 km
22.4 mpg US
26.9 mpg UK
7.6 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
VehiclePower-to-weight, hp/tFuel 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-BenzGLK (X204)GLK 300 V6
132 hp/t
98 kW/t
7.6 kg/hp
10.5 L/100 km
22.4 mpg US
26.9 mpg UK

Detailed score breakdown

Detailed score breakdown
VehicleMercedes-BenzGLS (X166)GLS 350dMercedes-BenzGLK (X204)GLK 300 V6
Power
258 hp
192 kW
231 hp
172 kW
Torque
620 Nm
457 lb-ft
300 Nm
221 lb-ft
Acceleration
7.8 s
7.6 s
Top speed
222 km/h
138 mph
210 km/h
130 mph
Lightness
2,380 kg
5,247 lb
1,755 kg
3,869 lb
Fuel consumption
7.6 L/100 km
30.9 mpg US
37.2 mpg UK
10.5 L/100 km
22.4 mpg US
26.9 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
5 doors
5 seats
Trunk
450 L
15.9 cu ft
Length
4,528 mm
178.3 in
Height
1,689 mm
66.5 in
Range score
1,316 km
818 mi
629 km
391 mi
CO2 score
199 g/km
-
Trunk score
680 L
24.0 cu ft
450 L
15.9 cu ft
Power-to-weight score
108 hp/t
81 kW/t
9.2 kg/hp
132 hp/t
98 kW/t
7.6 kg/hp
Overall
Fixed score
Fixed score

Fuel cost and annual usage

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

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
VehicleMercedes-Benz GLS (X166) GLS 350dMercedes-Benz GLK (X204) GLK 300 V6
Consumption7.6 L/100 km30.9 mpg US37.2 mpg UK10.5 L/100 km22.4 mpg US26.9 mpg UK
Cost / 100 km13.30 LC100 km18.38 LC100 km
Cost / 100 mi21.40 LC100 mi29.57 LC100 mi
Annual fuel used1,140 L301 US gal251 UK gal1,575 L416 US gal346 UK gal
Annual fuel cost1,995 LC/year2,756 LC/year

Head-to-head comparisons

Mercedes-Benz GLS (X166) GLS 350d

  • Has 27 hp more
  • Has 320 Nm more
  • Has 12 km/h (7 mph) higher top speed
  • Uses 2.9 L/100 km less fuel
  • Has 687 km (427 mi) more estimated range
  • Has 230 L more trunk volume

Pros

  • Highest top speed
  • Most powerful
  • Highest torque
  • Lowest combined fuel consumption
  • Best estimated range
  • Largest trunk

Cons

  • Slowest 0-100 km/h
  • Heaviest

Mercedes-Benz GLK (X204) GLK 300 V6

  • Is 625 kg lighter
  • Is 0.2 s quicker from 0-100 km/h
  • Has 23 hp/t better power-to-weight

Pros

  • Quickest 0-100 km/h in this comparison
  • Lightest
  • Best power-to-weight ratio

Cons

  • Lowest power
  • Highest combined fuel consumption
  • Lowest top speed
  • Smallest trunk

Choose cars to compare

Brand
Model
Generation
Engine or modification
Mercedes-Benz GLS (X166) GLS 350d
Mercedes-Benz GLK (X204) GLK 300 V6
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