That’s very poor that they don’t have a B class demonstrator to test drive. Do you have any other Mercedes dealers that are not too far away? I always think it’s sensible to test drive one as each person has different needs. Mine is the more upright seating position and a reasonable boot.
I was delighted when the dealer said that I could still have the red colour even though it was a more expensive ‘designer’ paint. I’m not sure why it’s more expensive but it is. I went into my nearest dealership to test drive the car but ended up ordering it from a dealer about 130 miles away as it was a much better deal with the AP. I hope that helps but if you are able to, I’d phone around to find out which dealer at least has a demonstrator but you don’t have to order one from them.