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2006. - 2009. Production 2005. - 2009.
S - Sports car Vehicle class S - Sports car
cabriolet, 2 door Body style cabriolet, 2 door
Rear Wheel drive Rear
Dimensons & Volumes
4091 mm
Length 4652 mm
1781 mm
Width 1740 mm
1299 mm
Height 1415 mm
240 liters
Boot (min) 276 liters
260 liters
Boot (max) 390 liters
55 liters
Fuel tank 62 liters
Mercedes Benz
3.0 M272 KE30
Petrol Fuel Petrol
6 - Inline, 4 valves per cylinder Configuration 6 - V config, 4 valves per cylinder
Naturally Aspir. Aspiration Naturally Aspir.
2497 cc
Displacement 2996 cc
218 hp
Power 231 hp
250 Nm
Torque 300 Nm
Performance (manual gearbox)
manual gearbox - 6 gears
manual gearbox - 6 gears
1260 kg
Vehicle weight 1605 kg
6.5 s
Acc. 0-100 7.7 s
240 km/h
Top speed 250 km/h
12.0 l/100km
Cons. (urban) 13.8 l/100km
6.3 l/100km
Cons. (highway) 7.0 l/100km
8.4 l/100km
Cons. (average) 9.5 l/100km
202 g/km
CO2 emissions 227 g/km
Performance (automatic gearbox)
automatic - 6 gears
automatic - 7 gears
1295 kg
Vehicle weight 1625 kg
6.9 s
Acc. 0-100 7.8 s
238 km/h
Top speed 245 km/h
12.8 l/100km
Cons. (urban) 13.3 l/100km
6.8 l/100km
Cons. (highway) 7.0 l/100km
9.0 l/100km
Cons. (average) 9.3 l/100km
216 g/km
CO2 emissions 222 g/km
13500 EUR
Price from 11500 EUR
Virtual Adviser's™ opinion


Well, these are two pretty similar cars we have here! It's only details that could potentially make the difference. Considering they both belong to the sports car segment and utilize the same 2-door cabriolet body style and the rear wheel drive system, it all comes up to the specific petrol engine choice they offer. The first one has a BMW-engineered powertrain under the hood, a 6-cylinder, 24-valves 218hp unit, while the other one gets its power and torque from a 6-cylinder, 24-valves 231hp engine designed by Mercedes Benz.


The fact that the BMW got tested by the European New Car Assessment Programme (Euro NCAP), while the other contender didn't, offers a slight advantage, as the 4-star rating is better than none. Still, apart from the official crash test results there are other things we need to be aware of. Both vehicles belong to the sports car segment, which is generally classifying them somewhere in the middle safety-wise, but that fact doesn't break the tie between the two cars. On the other hand, taking kerb weight as an important factor into account, CLK offers a considerable difference of 27% more metal.


Manufacturers have been building their reliability reputation for decades now and, generally speaking, it appears that both brands display similar results in faults and breakdowns, when all the models are taken into account. These are the results of an independent reasearch, while our visitors describe reliability of BMW with an average rating of 4.3, and models under the Mercedes Benz badge with 4.5 out of 5. Unfortunatelly, I don't have enough insight that would allow me to comment in more details on the specific models level. Above it all, drivers of cars with the same engine as BMW Z4 rank it on average as 4.0 out of 5, exactly the same as the other one.

Performance & Fuel economy

BMW is undoubtly more agile, reaching 100km/h in 1.2 seconds less than its competitor. Still, it lacks the power to win the top speed competition, topping at 240 kilometers per hour, 10km/h less than the other car. When it comes to fuel economy the winner has to be BMW Z4, averaging around 8.4 liters of fuel per 100 kilometers (34 mpg), in combined cycle. We can't ignore that 13% difference compared to CLK.


Mercedes Benz appears just a bit more reliable, although the difference is truly marginal. The most important thing when deciding between any two vehicles should always be safety, both passive and active. In my opinion, everything taken into account, BMW Z4 offers significantly better overall protection, taking the lead here. It all continues in the same direction, with BMW being considerably quicker, thus putting more smile on driver's face. To make things even better, it consumps less fuel! All together, there's not much more to say, in this case I wouldn't even consider anything but BMW. Nevertheless, let's not forget that people have different preferences and needs, so what really counts is your personal feel. I'm only here to help. I suggest you spend two more minutes in order to find out which car, based on your needs and budget, would be picked by the virtual adviser™, among thousands of similar, yet so different vehicles.
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