Un-braked Manufacturers towing capacity: 350 kg's
Braked Manufacturers towing capacity: 650 kg's

I personally wouldn't tow anything behind a Wagon R as they only weigh 850 kg and given the wind resistance of any form of caravan, the consequences of driving in any sort of wind could be dangerous

 

Short rear length. Tow anything. Difficult to back. The trailer and its shadow is close to Gross Weight. Let me play with your combo empty and I will roll it in any supermarket car park to prove the lie of safe maximum.