I've booked the car in with a local tuner who has said that he will have a go at sorting this issue out for me next week, but I'd like to be as informed as I can when I take the car.
I noticed today that my DRL's are coming on instead of the parking lights and the front parking lights are very dim, so when the light switch is in the parking light, dip beam, main beam, or lights turned on automatically, the DRL's are on, but in the Off position, nothing.
This is the coding that was used, taken from Steve P's guide.

When I get onto this screen, how do I change the 04 to 15 as suggested? Is it just a matter of typing it in, or does the binary value underneath need changing?