MERLIN AUTO SERVICES for MOT Testing in the Haverfordwest area, Pembrokeshire. You are invited to book an MOT online now using their live, real-time, Online MOT Booking System. View MERLIN AUTO SERVICES'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, MERLIN AUTO SERVICES will be aware of it within seconds, just turn up with your vehicle!