I have the same difficulties thinking of a replacement for my CLS which I’ve had coming up to 8 years now. Despite now having a baby and the sloped rear making it difficult to get the little one in, a 4pot E estate doesn’t appeal at the moment when I currently have a silky smooth 292bhp 6 cyl petrol.
Maybe the facelift W213 next year when I think all the petrols will be mild hybrid and the performance should be closer to what I currently have, but I’d rather buy at 2-3 years old so could be a bit of a wait.
Maybe I should try the current e220d which by all accounts does an amazing performance vs economy job. E43 would be amazing but they are so pricey still and a bit too showy. A regular 6 cyl in basic SE trim would be my ideal. Oh and a bonnet star please.
If you love your V6 I think you'd be better off with a Euro 6 350 CDI. Sweet spot of grunt, smoothness, economy and ULEZ compliance.