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Mercedes SLK 2004 fuel consumption

Mercedes SLK from 2004 to 2008 real fuel consumption according to user reports is approximately 16% higher compared to advertised fuel consumption. For petrol engines real consumption is in average 8% higher, but for diesel engines is approximately 23% higher. Since 2004 the Mercedes SLK average difference between owner-reported real-world fuel consumption and declared fuel economy has been less than industry average.

Year-to-year deviations of actual owner-reported average fuel consumption from advertised values

YearGasoline cars
All carmakersMercedes SLK
2004+7%+5%
Show all years
2005+8%+5%
2006+9%+5%
2007+11%+5%
2008+12%+5%

See below for the actual consumption of generations and versions of Mercedes SLK.

2004 - 2008

Mercedes SLK 2004 fuel economy

Average advertised fuel consumption for petrol engines23.8 MPG
9.9 l/100km
Average real-world fuel consumption for petrol engines23.4 MPG
10.0 l/100km
Average real gasoline consumption difference *insignificant

According to advertised fuel consumption, a Mercedes SLK 2004 with automatic transmission consumes on average 0.3 liters per 100 km or 3% less fuel than similar versions with manual gearbox. Based on user-reported real-world fuel consumption, this generation Mercedes SLK with automatic transmission consumes around 0.4 litres per 100 km or 5% more fuel than a version with the same engine but a manual gearbox.

The best real fuel economy in its class according to user reviews of all the modifications has modification with 3.5 petrol engine and manual transmission (Mercedes SLK 3.5 350 2004 272 HP). However, of all modifications the best advertised fuel economy in its class has Mercedes SLK with 3.0 petrol engine and automatic transmission (Mercedes SLK 3.0 280 2005 Automatic 231 HP).

ModificationClaimed consumptionReal consumption
1.8 liter petrol engine
Mercedes SLK 1.8 200 2004 Kompressor 163 HP manual 27.0 MPG
8.7 l/100km
25.8 MPG
9.1 l/100km+5%
Mercedes SLK 1.8 200 2004 Kompressor Automatic 163 HP automatic 26.7 MPG
8.8 l/100km
25.8 MPG
9.1 l/100km+3%
3.0 liter petrol engine
Mercedes SLK 3.0 280 2005 231 HP manual 24.2 MPG
9.7 l/100km
22.4 MPG
10.5 l/100km+8%
Mercedes SLK 3.0 280 2005 Automatic 231 HP automatic 25.3 MPG
9.3 l/100km
24.5 MPG
9.6 l/100km+3%
3.5 liter petrol engine
Mercedes SLK 3.5 350 2004 272 HP manual 22.2 MPG
10.6 l/100km
22.4 MPG
10.5 l/100km-1%
Mercedes SLK 3.5 350 2004 Automatic 272 HP automatic 23.3 MPG
10.1 l/100km
21.6 MPG
10.9 l/100km+8%
5.4 liter petrol engine
Mercedes SLK 5.4 55 2004 AMG 360 HP automatic 19.6 MPG
12.0 l/100km
19.0 MPG
12.4 l/100km+3%

* - Difference between advertised and user reported fuel economy has been calculated taking into account only those car versions for which information is available both on the fuel consumption specified by the manufacturer and reported by users.

User-reported fuel consumption may not accurately represent all users' experiences due to variables such as driving conditions, driving style, technical condition of the vehicle, and other circumstances. Thus, it should not be relied upon as a representative indicator.