We own a CLS350 Shooting Brake and have done since new in 2012. At the same time I also bought a ML500. If there is one thing I regret is that I did not buy a CLS 500 and ML 350. The CLS of that era is a fantastic car with a bespoke quality that is exceptional for long distance cruising The air suspension is perfect and to me far superior to that fitted to the ML. Ours is beautifully fitted with matt wood interior finish and the AMG fittings. i am not wild about the V 6 petrol engine. Although it has plenty of oomph there is a lack of top end power. THE 4.4 twin turbo V8 that was in the ML is truly one of the world's great engines. I still pine for my Jaguar V12 and its turbine like qualities. The MB V8 was very close. As it is the CLS comes closest in feel,,ride and stance to the series 3 XJ6 Jaguars that I so loved.. A CLS 500 to me would have been a XJ12 reincarnated without all the troubles.
I have the 350 diesel in my G Class. It has awesome torque and will probably crawl up a vertical wall. Its 190kW can also propel the bread bin at a fair pace but really that in something as refined as a CLS? Not for me ,sorry.