Hi Mark, I have listed a procedure, probably the same one that your mechanic used. However, the trick to the reset procedure is to carry out each stage within a second or two for it to work. Here goes.... Insert key into the ignition Hold reset (located on the right hand side of the steering column)Turn on ignition so fascia lights uplet go of reset/clearhold trip (on the end of the stalk)hold reset/cleardisplay should now indicate "resetting service mode" keep hold of buttons until...display now indicates "service mode reset" Hope this info helps? Regards, Trevor