I have a very small knock which is felt thru the accelerator pedal. It is intermittent and more noticeable when vehicle is cold. It will happen at any speed with constant pressure on the accelerator so is not governed by engine speed or road speed. It is entirely at random. It sometimes happens at acceleration or deceleration at low speed but I cannot replicate the knock stationary by changing from reverse to drive. It happens more often at between 10kph and 25kph but once again is intermittent. I also have a very small vibration thru the accelerator pedal at 100kph. It is not engine related and I suspect drive train. It only happens at 100kph and disappears above or below this speed. I would appreciate any thoughts on these problems. They could be linked and I am open for suggestions.