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Mercedes-Benz S-Class Hybrid (2014-2018) review

£29,907 Price from

Test score %

Key features
  • Large
  • Used only
  • Hybrid
Reviewed

On paper it looks almost too good to be true: a powerful luxury saloon with a fuel economy of more than 100mpg and CO2 of just 65g/km. At least, those are the claims for the Mercedes-Benz S500 Plug-In Hybrid, the petrol-electric hybrid version of the S-Class, launched in 2014. Are these claims borne out? Read our full road test review to find out.

Included in our expert review
  • Pros and cons
  • What is it?
  • What's it great at?
  • What's it like to drive?
  • How reliable is it?
  • How comfortable and spacious is it?
  • How economical is it to run?
  • How safe is it?
  • Is there anything I should look out for?
  • Should I buy it?
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Test results

The overall Which? test score is made up of the following star ratings, all determined by our rigorous lab tests.

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We have tested 643 new & used cars and found that there are 55 Don't Buys and 108 Best Buys.
Range of New & used car scores
  1. 4%
    Lowest score
  2. 62%
    Average score
  3. 85%
    Highest score
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