I have a 2016 GL450 158,000 miles with the dreaded low boost pressure code. I’ve vacuum tested both wastegate and the passenger side (bank 1?) holds the vacuum for over a minute. The drivers side does not hold any vacuum and barely moves when vacuum applied. Is there a way to just replace the actuator and not the whole turbo?? It looks possible but there is a paucity of information and it’s difficult to find just the actuator (unless Amazon or eBay).
