2013 to 2016 E Class convertible.

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These look reasonably good looking, and decent value for money.

It would be a second car, and probably 5000 miles a year max.

I have heard the diesel engined ones, suffer problems with the add blue tanks and pumps.

With that said, is the petrol engined ones the ones to go for?
If so, which one is the sweet spot.

We have an awesome Tesla, so no need for speed from the E Class.

Thanks.