mines not got any working glow plugs - did I get dissheartened, 'course I did, but I just went out to the Truck Part shop, bought the biggest battery they have, fitted it in the boot and hey presto, starts now! (not sure how long the starter will last as it now spins at 6000 rpm!!!!).
If your in doubght, keep it a while - any half competent garage can dissconect the air bag.
Chin up!