Car comparison

Mercedes-Benz GLS (X166) GLS 400vsMercedes-Benz GLK (X204) · Facelift 2012 GLK 350 V6

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

New comparison

Mercedes-Benz GLS (X166)

GLS 400

333 hp2996 ccGasolineAWDAutomaticTwin-turboSUV2015-2019
VS

Mercedes-Benz GLK (X204) · Facelift 2012

GLK 350 V6

306 hp3498 ccGasolineAWDAutomaticNaturally aspiratedSUV2012-2015

Comparison overview

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

Best choices

Mercedes-Benz GLS (X166) GLS 400

  • Fastest top speed
    240 km/h
    149 mph
  • Most powerful
    333 hp
    248 kW
  • Highest torque
    480 Nm
    354 lb-ft
  • Best estimated range
    1,064 km
    661 mi
  • Largest trunk
    680 L
  • Best overall score
    71/100
  • Best performance score
    60/100
  • Best practicality score
    93/100

Mercedes-Benz GLK (X204) Facelift 2012 GLK 350 V6

  • Quickest 0-100 km/h
    6.5 s
  • Lightest
    1,770 kg
    3,902 lb
  • Best power-to-weight
    173 hp/t
    129 kW/t
    5.8 kg/hp
  • Lowest combined fuel consumption
    8.2 L/100 km
    28.7 mpg US
    34.4 mpg UK
  • Lowest city consumption
    10.5 L/100 km
    22.4 mpg US
    26.9 mpg UK
  • Lowest highway consumption
    6.9 L/100 km
    34.1 mpg US
    40.9 mpg UK
  • Best economy score
    85/100

Specification comparison

Specification comparison
ModelMercedes-BenzGLS (X166)GLS 400Mercedes-BenzGLK (X204)Facelift 2012GLK 350 V6
Power
333hp248kW
306hp228kW
Torque
480Nm354lb-ft
370Nm273lb-ft
Curb weight
2,360kg5,203lb
1,770kg3,902lb
Gross weight
3,250kg7,165lb
2,420kg5,335lb
Top speed
240 km/h
149 mph
238 km/h
148 mph
To 99% top speed
93.3s99% target: 238 km/h / 148 mph
Calculated
77.2s99% target: 236 km/h / 146 mph
Calculated
0-100 km/h
6.6s
6.5s
0-200 km/h
29.1s
Calculated
26.6s
Calculated
0-60 mph
6.2s
Calculated
6.2s
Calculated
Fuel consumption
9.4L/100 km25mpg US30.1mpg UK
8.2L/100 km28.7mpg US34.4mpg UK
Fuel consumption city
11.7L/100 km20.1mpg US24.1mpg UK
10.5L/100 km22.4mpg US26.9mpg UK
Fuel consumption highway
8L/100 km29.4mpg US35.3mpg UK
6.9L/100 km34.1mpg US40.9mpg UK
Quarter mile
14.7s
Calculated
14.6s
Calculated
Power-to-weight
141hp/t105kW/t64hp/1000 lb
Calculated
173hp/t129kW/t78hp/1000 lb
Calculated
Torque-to-weight
203Nm/t136lb-ft/ton
Calculated
209Nm/t140lb-ft/ton
Calculated
Estimated range
1,064km661mi
Calculated
805km500mi
Calculated
Displacement
2,996cc183cu in
3,498cc213cu in
Length
5,130mm202in
4,536mm179in
Width
1,934mm76in
1,840mm72in
Height
1,850mm73in
1,669mm66in
Wheelbase
3,075mm121in
2,755mm108in
Front track
1,655mm65in
1,574mm62in
Rear track
1,675mm66in
1,597mm63in
Trunk volume
680L
450L
Max trunk volume
2,300L
1,550L
Doors
5
5
Seats
5
5
Fuel tank
100L
66L
CO2 emissions
218g/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 400Mercedes-Benz GLK (X204) Facelift 2012 GLK 350 V6PowerTorque
  • Mercedes-Benz GLS (X166) GLS 400: Power / Torque
  • Mercedes-Benz GLK (X204) Facelift 2012 GLK 350 V6: Power / Torque
Dyno simulation data table
VehiclePeak power RPMPeak torque RPMMax engine speed
Mercedes-BenzGLS (X166)GLS 4005,250-6,000 rpm1,600-4,000 rpm6,250 rpm
Mercedes-BenzGLK (X204)Facelift 2012GLK 350 V66,500 rpm3,500-5,250 rpm6,750 rpm

Acceleration curve

Estimated speed over time for selected vehicles.

Acceleration and drag-race table
MetricMercedes-BenzGLS (X166)GLS 400Mercedes-BenzGLK (X204)Facelift 2012GLK 350 V6
Acceleration checkpoints
0-60 mph
0-97 km/h
6.2 s
6.2 s
0-100 km/h
0-62 mph
6.6 s
6.5 s
0-200 km/h
0-124 mph
29.1 s
26.6 s
Top speed
240 km/h
149 mph
238 km/h
148 mph
Drag race simulation
60 ft
18 m
2.3 s
2.4 s
330 ft
101 m
6.3 s
6.3 s
1/8 mile
201 m
9.5 s
9.5 s
1000 ft
305 m
12.3 s
12.3 s
1/4 mile
402 m
14.7 s
14.6 s
Trap speed
1/4 mile
402 m
154 km/h
96 mph
158 km/h
98 mph

Power comparison

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

Chart data table
VehicleValue
Mercedes-BenzGLS (X166)GLS 400
333 hp
248 kW
Mercedes-BenzGLK (X204)Facelift 2012GLK 350 V6
306 hp
228 kW

Mercedes-Benz GLS (X166) GLS 400 has 27 hp more than Mercedes-Benz GLK (X204) Facelift 2012 GLK 350 V6.

The biggest power difference is between Mercedes-Benz GLK (X204) Facelift 2012 GLK 350 V6 and Mercedes-Benz GLS (X166) GLS 400: 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 400
480 Nm
354 lb-ft
Mercedes-BenzGLK (X204)Facelift 2012GLK 350 V6
370 Nm
273 lb-ft

Curb weight comparison

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

Chart data table
VehicleValue
Mercedes-BenzGLS (X166)GLS 400
2,360 kg
5,203 lb
Mercedes-BenzGLK (X204)Facelift 2012GLK 350 V6
1,770 kg
3,902 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 400
240 km/h
149 mph
Mercedes-BenzGLK (X204)Facelift 2012GLK 350 V6
238 km/h
148 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 4006.6 s
Mercedes-BenzGLK (X204)Facelift 2012GLK 350 V66.5 s

Although Mercedes-Benz GLS (X166) GLS 400 has more power, Mercedes-Benz GLK (X204) Facelift 2012 GLK 350 V6 is quicker from 0-100 km/h.

The biggest 0-100 km/h difference is between Mercedes-Benz GLK (X204) Facelift 2012 GLK 350 V6 and Mercedes-Benz GLS (X166) GLS 400: 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
VehicleValue
Mercedes-BenzGLS (X166)GLS 400
9.4 L/100 km
25.0 mpg US
30.1 mpg UK
Mercedes-BenzGLK (X204)Facelift 2012GLK 350 V6
8.2 L/100 km
28.7 mpg US
34.4 mpg UK

The biggest fuel consumption difference is between Mercedes-Benz GLK (X204) Facelift 2012 GLK 350 V6 and Mercedes-Benz GLS (X166) GLS 400: 1.2 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 400
141 hp/t
105 kW/t
7.1 kg/hp
Mercedes-BenzGLK (X204)Facelift 2012GLK 350 V6
173 hp/t
129 kW/t
5.8 kg/hp

Estimated range comparison

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

Chart data table
VehicleValue
Mercedes-BenzGLS (X166)GLS 400
1,064 km
661 mi
Mercedes-BenzGLK (X204)Facelift 2012GLK 350 V6
805 km
500 mi

Performance spider chart

Radar chart comparing normalized performance and fuel-consumption scores.

Chart data table
VehiclePowerAccelerationTop speed
Mercedes-BenzGLS (X166)GLS 400
333 hp
248 kW
6.6 s
240 km/h
149 mph
Mercedes-BenzGLK (X204)Facelift 2012GLK 350 V6
306 hp
228 kW
6.5 s
238 km/h
148 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 400
Power
333 hp
248 kW
0-100 km/h6.6 s
Top speed
240 km/h
149 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)Facelift 2012GLK 350 V6
Power
306 hp
228 kW
0-100 km/h6.5 s
Top speed
238 km/h
148 mph
Doors/seats
5 doors
5 seats
Trunk
450 L
15.9 cu ft
Length
4,536 mm
178.6 in
Height
1,669 mm
65.7 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 400
Power
333 hp
248 kW
0-100 km/h6.6 s
Top speed
240 km/h
149 mph
9.4 L/100 km
25.0 mpg US
30.1 mpg UK
Mercedes-BenzGLK (X204)Facelift 2012GLK 350 V6
Power
306 hp
228 kW
0-100 km/h6.5 s
Top speed
238 km/h
148 mph
8.2 L/100 km
28.7 mpg US
34.4 mpg UK

Mercedes-Benz GLK (X204) Facelift 2012 GLK 350 V6 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 400
9.4 L/100 km
25.0 mpg US
30.1 mpg UK
6.6 s
Mercedes-BenzGLK (X204)Facelift 2012GLK 350 V6
8.2 L/100 km
28.7 mpg US
34.4 mpg UK
6.5 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 400
141 hp/t
105 kW/t
7.1 kg/hp
9.4 L/100 km
25.0 mpg US
30.1 mpg UK
Mercedes-BenzGLK (X204)Facelift 2012GLK 350 V6
173 hp/t
129 kW/t
5.8 kg/hp
8.2 L/100 km
28.7 mpg US
34.4 mpg UK

Detailed score breakdown

Detailed score breakdown
VehicleMercedes-BenzGLS (X166)GLS 400Mercedes-BenzGLK (X204)Facelift 2012GLK 350 V6
Power
333 hp
248 kW
306 hp
228 kW
Torque
480 Nm
354 lb-ft
370 Nm
273 lb-ft
Acceleration
6.6 s
6.5 s
Top speed
240 km/h
149 mph
238 km/h
148 mph
Lightness
2,360 kg
5,203 lb
1,770 kg
3,902 lb
Fuel consumption
9.4 L/100 km
25.0 mpg US
30.1 mpg UK
8.2 L/100 km
28.7 mpg US
34.4 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
5 doors
5 seats
Trunk
450 L
15.9 cu ft
Length
4,536 mm
178.6 in
Height
1,669 mm
65.7 in
Range score
1,064 km
661 mi
805 km
500 mi
CO2 score
218 g/km
-
Trunk score
680 L
24.0 cu ft
450 L
15.9 cu ft
Power-to-weight score
141 hp/t
105 kW/t
7.1 kg/hp
173 hp/t
129 kW/t
5.8 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 400Mercedes-Benz GLK (X204) Facelift 2012 GLK 350 V6
Consumption9.4 L/100 km25 mpg US30.1 mpg UK8.2 L/100 km28.7 mpg US34.4 mpg UK
Cost / 100 km16.45 LC100 km14.35 LC100 km
Cost / 100 mi26.47 LC100 mi23.09 LC100 mi
Annual fuel used1,410 L372 US gal310 UK gal1,230 L325 US gal271 UK gal
Annual fuel cost2,468 LC/year2,153 LC/year

Head-to-head comparisons

Mercedes-Benz GLS (X166) GLS 400

  • Has 27 hp more
  • Has 110 Nm more
  • Has 2 km/h (1 mph) higher top speed
  • Has 259 km (161 mi) more estimated range
  • Has 230 L more trunk volume

Pros

  • Highest top speed
  • Most powerful
  • Highest torque
  • Best estimated range
  • Largest trunk

Cons

  • Slowest 0-100 km/h
  • Highest combined fuel consumption
  • Heaviest

Mercedes-Benz GLK (X204) Facelift 2012 GLK 350 V6

  • Is 590 kg lighter
  • Is 0.1 s quicker from 0-100 km/h
  • Uses 1.2 L/100 km less fuel
  • Has 32 hp/t better power-to-weight

Pros

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

Cons

  • Lowest power
  • Lowest top speed
  • Smallest trunk

Choose cars to compare

Brand
Model
Generation
Engine or modification
Mercedes-Benz GLS (X166) GLS 400
Mercedes-Benz GLK (X204) GLK 350 V6
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