Hi,
Welcome, You should not regret buying a Pogoda,
Does the SL shop offer a guarantee or report on the car ?
I would recommend that you look in the technical manual here on site under the content section lower down Buying a car ithere is a lot of informatn there about what to look for. It would be worth your while to read that section and have a look at a few cars rather than buying the first one you see.
Also The Mercedes Benz Club UK, has I believe valuers or will look at a car for a fee.
There are also vendors on this site .
Good luck
Let us know how you get on.
Paul.