I've had a knocking/rattle noise sounding from the rear nearside interior of the car for sometime. At first it was minimal but more recently has become louder and extremely irritating - in fact very very annoying. Boot emptied etc to try and locate the offending cause. No luck. A trip to the dealer was needed and I was informed they had had three CR-V's with the same problem and would need to road test the car. It would appear the knock/rattle is from the mechanism in the rear nearside seat upright. The short term fix until the new mechanism arrives is a piece of insulating tape on metal bar that the mechanism locks on to. Car has been tested and new part ordered under warranty. If anyone else is having this problem I hope this helps.