My elderly father has been presented with a bill for £800 to change glow plugs on the above car (Halfords Autocentre). Main dealer did diagnotics and said car failing to start was due to wiring issues with the glow plugs. Halfords have had his car for 2 weeks, changed the plugs and still the car will not start! Now are ordering another part for the exhaust(?) at a cost of £100. Is this excessive? Seems so to me.