I reported the issue to Jaguar Customer Care 10 days ago and have had a reply that dealer was to take in car for 4 days; record noise and discuss with Jaguar Cars, the dealer would telephone me directly to arrange. After a week of no response from dealer I rang them late afternoon to ascertain when my car was due in. The response received was from Service Manager. I to cannot in my own mind accept that Jaguar would knowingly accept this as an inherent design flaw. I am waiting for confirmation from Jaguar Customer Care this is so. Future R Sport buyers be prepared for same fault if my dealer's statement is correct. Don't forget "clunk clunk every trip"