In comparing the BMW 6 Series's and the Mercedes-Benz CLS's specifications and ratings, the BMW 6 Series has the advantage in the areas of typical lower range of pricing for one- to five-year-old used cars, and interior volume. The Mercedes-Benz CLS has the advantage in the areas of fuel efficiency, reliability, resale value, overall quality score and base engine power. Based on this comparison of the BMW 6 Series's and the Mercedes-Benz CLS's specifications and ratings, the Mercedes-Benz CLS is a better car than the BMW 6 Series.
BMW 6 Series vs. Mercedes-Benz CLS Pricing
A used 2019 BMW 6 Series ranges from $34,889 to $68,629 while a used 2019 Mercedes-Benz CLS is priced between $40,997 to $62,853.
BMW 6 Series vs. Mercedes-Benz CLS Resale/Retained Value
Looking at the 5-year depreciation rate for both models, the BMW 6 Series loses 59.2 percent of its value and the Mercedes-Benz CLS loses 53.8 percent of its value. This means the Mercedes-Benz CLS retains 5.4 percentage points more of its value and has the advantage of higher resale value versus the BMW 6 Series.
BMW 6 Series vs. Mercedes-Benz CLS Quality Rating
The iSeeCars Overall Quality rating for the BMW 6 Series is 7.0 out of 10 while the Mercedes-Benz CLS's quality rating is 7.7 out of 10. This results in the BMW 6 Series being ranked 17 out of 24 Best Luxury Large Cars and the Mercedes-Benz CLS being ranked 11 out of 24.
BMW 6 Series vs. Mercedes-Benz CLS Reliability Rating
iSeeCars’ Reliability Rating for the BMW 6 Series is 7.1 out of 10. For the Mercedes-Benz CLS the reliability rating is 7.9 out of 10. This gives the Mercedes-Benz CLS a slight advantage in reliability compared to the BMW 6 Series.
Engine Power and Fuel Efficiency Comparison
For engine performance, the BMW 6 Series’s base engine makes 315 horsepower, and the Mercedes-Benz CLS base engine makes 362 horsepower. The 6 Series is rated to deliver an average of 23 miles per gallon, with a highway range of 537 miles. The CLS is rated to deliver an average of 26 miles per gallon, with a highway range of 654 miles. This gives the Mercedes-Benz CLS the fuel efficiency and maximum range advantage over the BMW 6 Series. Both models use premium unleaded.
Passenger Space Comparison
While both models are large cars, the BMW 6 Series has the advantage of offering more interior volume, reflected in more front head room, front leg room, rear head room, rear leg room, and cargo space. The Mercedes-Benz CLS has the advantage in the areas of front shoulder room and rear shoulder room.