Hello I've just had my van serviced and MOT and while testing the company who did the work found a fault with 2 glow plugs. Nothing's showing on my dash as warning and they said once either starts to create a problem my coil light will flash yellow and then if I ignore it the light will go red. Now not knowing a blind bit on motors the quote had me fainting. It's over £500 or could go up to £1200 if a plug snaps on removal as the head will need to be removed. The van is 8 years old and they told me they can be a job to shift when they have been sat there that long. So is it really that expensive to change glow plugs?? Must be far different than my old mini where I took spark plugs out every month with ease.