HIGHLINE AUTOS for MOT Testing in the Hertford area, Hertfordshire. You are invited to book an MOT online now using their live, real-time, Online MOT Booking System. View HIGHLINE AUTOS's live MOT booking diary and select the date and time that best suits you. On completing your booking you will receive an immediate confirmation by email. There's no need to phone to confirm your booking, HIGHLINE AUTOS will be aware of it within seconds, just turn up with your vehicle!