Hidden menu, feature enabling, service light indicator (spanner) reset procedures, secret menu, software update, seat belt chime disabling, OBD port location, VCDS procedures, car diagnostics, fuses and relays, force reboot of navigation system, HVAC settings and calibrations, maintenance & repairs, tuning & modifications, tips & tricks.
I specialize in Audi, BMW, SEAT, Skoda, Volvo, Volkswagen cars. Constantly learning new things, right now about Golf MK7.