Hello & Welcome to the Forums.
2 wks ago, I bought a Clio Dymanique and this morning I couldn't start the car. The immobiliser key unlocks the doors ok, but the key will not turn in the ignition. The red immobiliser light stays in flashing mode but nothing happens and the key simply won't move. I've also tried the spare key, but the same thing happens.
Does anyone have an idea what the fault could be before I go back to the Dealer?
If your car is covered by a warranty return to the dealer A.S.A.P.
Use the Forums search Facility input - Immobiliser quite a bit of info in the Forums on the subject.