There are a few things to take into consideration if you want to tow a car with your motorhome in the EU:
Firstly, you’ll need to check that you have the right kind of driving licence to tow.
You’ll then need to confirm the Gross Train Weight (GTW) your vehicle is allowed to tow. You can normally find this on a plate inside the driver or passenger door, or on the paperwork for your vehicle.
Then you’ll need to confirm how much weight you’re planning to carry. You can do this by checking the weight of your campervan or motorhome when it’s fully loaded, including passengers, and adding the weight of the car you plan to tow, along with any frames or trailers you plan to use
Once you’ve done this, you’ll need to confirm that your combined GTW is under the limit for your vehicle and your licence. Most people on a standard UK car licence are allowed to tow up to 750kg max trailer weight (fully laden) and up to 3.5 tonnes as a GTW.
Decide if you’d rather use a trailer or an A-frame. Most countries don’t have specific laws banning A-frames, but they may have a law which prohibits a motor vehicle towing another motor vehicle. You can find some useful general advice on A-frames on the Government website
Check whether you need to register your trailer before using it abroad.
Finally, check your tow bar weight capacity and consider how towing will affect your campervan or motorhome loading, such as the pressure it will put on the rear axle and how this might impact how your vehicle handles.