AKIPRESS.COM - Mr Cleyndert had the car jacked up and ready to be worked on and helped Mr Medcalf, who has been working on Bentleys for 22 years, reports The Telegraph.
The owner, who runs a bespoke furniture firm, got back into the car with partner Jacqui Norman and headed off on their adventure.
They ended up finishing 21st overall and fourth in their class, winning the European Cup on their way through.
Mr Cleyndert, 58, from Norfolk, said: "The rear wheel wouldn't rotate. The brilliant rally mechanics stepped in and towed the car across the border at 2mph. We then put it on a low loader and transported it to the 'campsite'.
"It was a heroic effort by William to get to us and within ten minutes we were on our way.
"We had to make the most of it and we ended up winning the European Cup which started in Poland. The Bentley is a fabulous car and it took it in its stride. It was a great experience and we thoroughly enjoyed it."