can anyone please help to clear up our mystery , we got a second hand towbar for our audi a4 , only to be told by the audi dealer not to fit it ,??it has numbers on it and the letter ..r on the end of the numbers ,is it a recall or a reject ? we dont know , the audi people seem a bit cagey about this , so we are at a total loss ,our car is an r reg , all we have heard up to now is that it may have been upgraded but why cant we fit this one , please help its sending us round the bend ,...thanks ,...wendy&pete