Drive: New choice of engines

Jun 28, 2014
Thrilling dynamism and exemplary efficiency are the strong points of the engines for the next-generation CLS Coupé and CLS Shooting Brake.
All five of the engines available for the two iconic designs feature state-of-the-art technology. All are thus compliant with the Euro 6 standard.
The BlueTEC diesel engines for the CLS-Class are environmentally friendly but powerful. Developed by Mercedes-Benz, BlueTEC is a modular concept that effectively reduces emission levels from diesel vehicles. The CLS-Class BlueTEC models are equipped with an oxidising catalytic converter and particulate filter, as well as an exceptionally durable NOx storage-type catalytic converter. These are combined with an additional SCR (Selective Catalytic Reduction) converter. SCR exhaust gas aftertreatment converts nitrogen oxides into harmless nitrogen and water vapour, thereby keeping untreated emissions to a minimum.
The new entry-level model is the four-cylinder diesel engine in the CLS 220 BlueTEC featuring fourth-generation common rail direct injection, two-stage turbocharging and BlueTEC technology. It generates 125 kW (170 PS) with maximum torque of 400 Nm. Acceleration from 0 to 100 km/h takes 8.3 seconds (Shooting Brake 8.6 seconds); the top speed is 226 km/h (Shooting Brake 220 km/h) and it consumes 4.6 litres of diesel (Shooting Brake 4.9 litres) over 100 kilometres (NEDC combined). This corresponds to CO2 emissions of 122 (127) grams per kilometre. The same engine appears in the CLS 250 BlueTEC and CLS 250 BlueTEC 4MATIC, as well as in the equivalent Shooting Brake variants. In this version it delivers 150 kW (204 hp) and creates 500 Nm of torque to spin the crankshaft.
The most powerful diesel engine within the CLS-Class is the V6 in the CLS 350 BlueTEC and CLS 350 BlueTEC Shooting Brake. It produces 190 kW (258 hp) of power (CLS BlueTEC 4MATIC – 185 kW (252 hp)) and supplies torque of 620 Nm.
CLS-Class diesel engines
Model
 
 
Cyl.
 
 
Disp.
cc
 
kW/hp
at rpm
 
Nm
at rpm
 
0-100
km/h)
 
l/100 km
 
 
CO2
g/km
 
CLS 220 BlueTEC
 
 
4/in-line
 
 
2143
 
 
125 / 170
3000–4200
 
400 Nm /
1400–2800
 
8.3 s
(8.6 s)
 
4.6
(4.9)
 
122
(127)
 
CLS 250 BlueTEC
 
 
4/in-line
 
 
2143
 
 
150 / 204
3800
 
500 Nm /
1600–1800
 
7.5 s
(7.7 s)
 
4.6
(5.0)
 
122
(130)
 
CLS 250 BlueTEC 4MATIC
 
 
4/in-line
 
 
2143
 
 
150 / 204
3800
 
500 Nm /
1600–1800
 
7.9 s
(8.1 s)
 
5.3
(5.5)
 
140
(146)
 
CLS 350 BlueTEC
 
 
V6
 
 
2987
 
 
190 / 258
3600
 
620 Nm /
1600–2400
 
6.5 s
(6.6 s)
 
5.4
(5.7)
 
140
(149)
 
CLS 350 BlueTEC 4MATIC
 
 
V6
 
 
2987
 
 
185 / 252
3600
 
620 Nm /
1600–2400
 
6.7 s
(6.8 s)
 
6.1
(6.6)
 
160
(174)
 
(Figures in brackets: CLS Shooting Brake)
 
Petrol engines set benchmarks
A new six-cylinder petrol engine celebrates its début in both models. Key benefits include turbocharging, stratified charge operation and a 3.5-litre displacement. Unlike the familiar V6 biturbo with three-litre displacement, the new engine operates in either stratified or homogeneous mode depending on the operating conditions. It thus continues to deploy what is known as stratified combustion as launched with the 3.5-litre V6 naturally aspirated engine in 2011. With stratified charge operation there is significant excess air. To this end, the fuel is not injected into the air until the compression phase, after the air has been compressed by the pistons. A precision-controlled electronic multiple injection process ensures that a fuel-air cloud localised in the area of the spark plug forms only at the time of ignition. The spark plug lights the ignitable fuel/air mixture around it, while only a very lean mixture with a high proportion of excess air is to be found in the remainder of the combustion chamber. This enables extremely efficient combustion. Gas cycle losses are reduced considerably because adjustment to the operational load takes place largely without the intake air throttle.
Compared to the previous naturally aspirated engine in the CLS 350, the new six-cylinder engine produces 20 kW more output at 245 kW (333 hp). Its torque increases by 110 Nm to 480 Nm and is available in the wide engine speed range from 1200 to 4000 rpm. Thanks to its output potential and extremely high torque at lower engine speeds than the three-litre V6 biturbo, the new stratified charge engine provides the ideal conditions for sporty, agile driving pleasure and a high level of refinement combined with high efficiency.
The V8 petrol engine in the CLS-Class hits its power peak at 300 kW (408 hp) and up to 600 Nm of torque.
CLS-Class petrol engines
Model
 
 
Cyl.
 
 
Disp.
cc
 
kW/hp
at rpm
 
Nm
at rpm
 
0-100
km/h)
 
l/100 km
 
 
CO2
g/km
 
CLS 400
 
 
V6
 
 
3498
 
 
245 / 333
5250–6000
 
480 Nm /
1200–4000
 
5.3 s
(5.4 s)
 
7.3
(7.5)
 
169
(175)
 
CLS 400 4MATIC
 
 
V6
 
 
3498
 
 
245 / 333
5250–6000
 
480 Nm /
1200–4000
 
5.3 s
(5.4 s)
 
8.0
(8.3)
 
187
(192)
 
CLS 500
 
 
V8
 
 
4663
 
 
300 / 408
5000–5750
 
600 Nm /
1600–4750
 
4.8 s
(4.9 s)
 
8.5
(8.8)
 
199
(205)
 
CLS 500 4MATIC
 
 
V8
 
 
4663
 
 
300 / 408
5000–5750
 
600 Nm /
1600–4750
 
4.8 s
(4.9 s)
 
9.6
(9.8)
 
224
(229)
 
(Figures in brackets: CLS Shooting Brake)
14C472_015
  • Legend
    Mercedes-Benz CLS-Class model year 2014, CLS 500 4MATIC, engine
  • Release date
    Jun 28, 2014
14C635_01
  • Legend
    Mercedes-Benz CLS-Class model year 2014, technology, CLS 63 AMG 4MATIC
  • Release date
    Jun 28, 2014
14C635_04
  • Legend
    Mercedes-Benz CLS-Class model year 2014, technology, CLS 63 AMG 4MATIC
  • Release date
    Jun 28, 2014
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