Why won't my diesel Zafira start?

My 53 reg 2.0 DTi Vauxhall Zafira won't always start, unless you repeatedly try. But until the light on the dashboard with the little car and spanner appears then it will start. Any ideas?

Asked on 17 December 2016 by Mark White

Answered by Honest John
I would guess that you are having to wait for the glow plugs to heat up before the engine will fire.
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