Mercedes coupe c180 kompressor

Description:

My wee cousins red Mercedes coupe.
It's a 1.8 petrol.
Will update the miles asap but they aren't high.
It's been very well looked after.
She paid £2000 for it about 6 months ago from a garage in Edinburgh.
And I had it in a local garage getting a service as soon as she got it just to make sure it was tip top.
Looking for preferably a diesel car as she does a 90 mile around trip a few times a week. But doesn't 100% have to be diesel but please no 2.0 litres or above. Unless diesel.
Prefer Astra convertible or Bmw why.