hi there ive got mk 4 golf 1.8 20v non turbo, when got it garage serviced it new cambelt etc(non vw) it was at 69,500 miles, now today at 72,600 then service/oil display is showing? will this mk3 trick work on a mk4? the miles display is on right hand side of clocks (which is showing oil service) and the mfa is on the left with rev counter any help would be nice!, oil is golden gonna change at 5000 but only done 3000! please help!