Hello, my name is Mark and I will try help you with this.
Can you tell me what make, model, year and engine you have?
scenic 1.5 2004 diesel
A diesel does't have ignition coils.
Do you mean glowplugs?
i dont know could be missing badly and smoke
ignition sign on dashboard
You need to get a scan tool connect to the car and read what fault codes are stored.
Most garages can do this for you.
I would also advise not driving it too far if it is smoking and misfiring.
its not just the case of fitting new glow plugs
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