Well i've had the same type of knock from the near side front, on my Stepway. It happens mainly when the car is on full lock and turning right, but sometimes it happens when going slowly over a bump. It has been there from new, put it in to be seen to, but mechanics couldn't find anything, including the knock. When i went to pick it up,i took the mechanic out and demonstrated the noise, he said what's that,(enough said).
It's now back in the garage with instructions,to start changing parts, and not to send back until fixed.
The car was bought new in May 2014, also had the headlight beam too low problem as well, had them fixed at garage, but were still a bit dim, changed to brighter bulbs, good now.
I'd like to find out how, WGB got on with his visit to the garage and was it fixed.
Regards Jim.