I think it connects electrical components inside the car to the ecu. I might be totally wrong. But when you fit cruise control you need to move the relay and it has wires with different ampeage.

Could it not be the fuel then? What were they on about showing you dirty diesel in a glass?
 
When you say it doesn't start - does that mean it turns over but fails to start, or there is nothing at all and its completely dead?
 
I think it connects electrical components inside the car to the ecu. I might be totally wrong. But when you fit cruise control you need to move the relay and it has wires with different ampeage.

Could it not be the fuel then? What were they on about showing you dirty diesel in a glass?

I dont know what they was on about dodgy stuff trying to say its been contaminated. No way has it.

Hopefully we are over the mess now and the warranty gets it fixed.

Fingers crossed.

Really missing the leon fr, the 09 ibiza petrol in lime green is not the same!