Hello Fran,
There is good advice that tells us to keep car heavier than the caravan. but the oft quoted 1:0.85 is just a guideline, and few percent either way is unlikely to be a major problem.
Whilst your caravan is quite large, provided the driver takes care it is a viable match at about 90% but it will require care but then all towing requires care.
So the Mondeo has earned a good reputation and has all the power you really need, but there could be a fly in the ointment, and that depends on when the driver passed their driving test as Roger has already pointed out.
Based on the information that has been provided, you are considering the Mondeo 2.0l tdci titanium x year 08. The data base I use shows it as having a kerb weight of 1557Kg. Now I dont have the the Gross Vehicle Weight (GVW) for this model,but the current model that has a similar kerb weight has a GVW of 2290Kg.
As Roger has already pointed out that if you only have cat B (not B+E) then you are limited to a combined MAM (Cars GVW + Caravans MTPLM)not exceeding 3500Kg. Even allowing for a small variation for nose weight, your combined outfit is close to 3700Kg. A Cat B only driver will be illegal if they drive this outfit.
You cannot get round this limitation by only part loading the vehicles, because the licence looks at the maximum limits not measured values.
The above limitation does not apply ifyou have Cat Be or B+E which rasies the MAM limit.