Whilst SamandRose's answer won't see you falling foul of any legalities but it glosses over one or two technicalities
SamandRose said:
Sorry for the late reply baileyorion
You don't specify a towing limit for your Mondeo, which should be on either the V5 or the VIN plate. The limit is set by the manufacturer, is model-specific (so you can't assume that it will be the same as that for another Mondeo with a different engine) and it's illegal to tow more than that.
The towed weight limit is specific to the model you are looking at. You cannot assume it will be the same as any other model even with the same engine size. Different body styles, and even trim levels have been know to produce a different towed weight limit, so always check the exact value for your car.
SamandRose said:
If a car does not have a manufacturer's towing limit, then my understanding is that it's not approved to tow at all, and to do so would be illegal and would almost certainly invalidate your insurance.
The information and the format of the VIN plate is standardised for vehicles sold in the EU. For vehicles that are not approved for towing, the VIN plate will omit the value for the Gross Train Weight as it can't legally form part of a train, it will only show the Gross Vehicle Weight and the maximum Axle Loads.
SamandRose said:
Subject to the car having a towing limit that's greater than the MTPLM of your caravan, I would agree with the other's' comments regarding the likely towing performance.
As a general process choosing a trailer with an MTPLM value less than towed weight limit of the car is perfectly acceptable and will always land you on the right side of the weight laws. But there is an aspect of that suggestion which may be misleading:-
Most cars have a towed weight limit which is frequently greater than the cars unladen weight, (This is not always the case so its important to check the specification of your exact vehicle.). That does not make it wrong to tow up to that limit, but just ill advised especially with a caravan. It is more sensible to use a car that has an unladen weight advantage over the caravan. in other words a towing ratio of less than 100%, The UK Industry guidance suggest keeping it below 85%.