Bottom line is at the end of the day its your decision....but for what my 2pence is worth here goes....!
1. Consider how much you earn each month each month.
2. Work out all your regular monthly outgoings, rent/mortgage/phone/ petrol/food/loan payments/credit card payments/beer money etc.
3. Deduct (2) from (1) this will tell you how much money you have left (if any) each month and give you an idea of your LIQUIDITY - how much £ you have or dont have and how easy it is to make ends meet.
4. Then consider emergency fund/exceptional expenses.....such as holidays, new tyres, and other items which can pop up...such as the central heating breaking. Will you have sufficient funds to cover several of these expenses if they arise out of the blue.
It worth considering the bigger picture, at the end of the day we all want to have the new desirable gadget/car etc tomorrow.....but it rarely makes economical sense. You need to consider whether you can afford a new car. For example...youll be looking at a total loan (taking into account VTS trade in) of approx.
£15,000 say at an APR. of 7.9%
Over 5 years that £300 per month, just for the loan! And how much will the car be worth in 5 years?? £3000 - £4000 Max!!
Consider what else youre going to want in the next five years...eg. buy a house/move house.
Id advise against the new 182 however much you want it....and recommend that you concentrate on managing your current debt rather than increasing your existing liabilities.
BUT all in all make a decision that you can live with, and one that youre happy with! It may be sensible to discuss this through with friends/family/or even...the dreaded bank manager!
DISCLAIMER: Purely my opinions - this is not intended to provide any financial advice!