He couldnt find the fault after 3 times!!!

My car went in for a \pinging "noise on the 20/05/2015 it stood there at West Rand Motors for six days(6).The following day 28/05/2015 the car made the same noise but even worse.Marius was busy so I could only book the car in on the 02/06/2015.Marius did the settings again for the car was alright for 20 km then back to same noise.I phone Marius again"