While the Mercedes S500 plug-in hybrid may offer comparable performance to the 550 V8 but with much improved economy, the way it all comes together detracts from the overall S-Class experience.
CNET’s Brian Cooley criticizes the plug-in for being too jarring around town. He also bashes it for not being a model that Mercedes itself wanted to make, being more of a regulation appeaser instead – this apparently shows in the overall impression it leaves.
This review says it’s by no means the best S-Class, and that it’s one nobody asked for…
Maybe with some software updates and tweaks, they will improve it over time. They are most likely going to do that – the first S-Class hybrid was passable, this new one is better – we’ll probably have to wait for another update before it evolves enough to be considered ‘proper.’