Some inspection on the net and the workshop manuals revealed that the inner shaft bearing was the likely culprit.
My job today was to strip the suspension for the 3rd time this month.
bash plat off - I hate this job as it weighs a ton!
wheel off
top ball joint off
top control arm off
coilover shock spring off
inner CV cup off
swivel half shaft out of the way
fabricate sliding hammer to get the inner shaft out
what remains of the old bearings balls falls to the ground
grind the old inner casing off carefully
manufacture a press for the new bearing
press bearing on
reassemble
MB160662 for the bearing - R107.10 from the dealer


and a pic of the new CV boot