For a 2015 Golf R, there is no 'set' replacement interval for the timing chain, as it's designed to last the life of the engine, however, replacement is typically recommended between 80,000 and ...
With reference to Chris Jones' question about the timing chain problems on VWs my own experience with my 2010 Mk VI GTi with 79,000 km and which had only ever been serviced by VW dealers, when the ...