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Mercedes-Benz SLK AMG (2004-2010) running costs and reliability

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Running costs rating: 2 out of 52.0

Written by David Ross Published: 6 June 2019

Miles per pound (mpp)

Reliable fuel consumption data for comparison purposes is not available for this model.

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Fuel economy

A more stringent standard for fuel economy (WLTP) was introduced from September 2017, and this model was not required to undergo that test. Its fuel economy measured under the previous test system was 23 mpg. However these figures are less likely to be achievable in real world driving and so should never be compared to another car's mpg which was measured under the newer, more realistic WLTP system.

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As you’d expect of any AMG model, the SLK is not a cheap car to buy, or run. Resale values will be quite strong, with people able to sell in three years for about half what they paid for it. However, it still means they stand to lose as much as £30,000. Fuel economy is poor too at just 24mpg while Mercedes-Benz dealer servicing is notorious for being some of the most expensive around.

The SLK AMG is a polluting model, with emissions of 288g/km of CO2 while economy is poor with an average of just 24mpg. Unlike alternatives such as the Audi TT, there is no diesel engine available.

Mercedes-Benz has worked hard to improve its reliability in the last few years, and the SLK is better than some of their earlier efforts like the 2003 C-Class and 2002 CLK models.