try while starting the engine to press the accelerator pedal, to bring the engine revs up to more than 2000 RPM, if this keeps the engine running and not stalling then this means you have a fault with the crankshaft sensor , if not then you might have a problem with the fuel pump.
As for the main maintenance (60 K), there is not fixed measure to say how much can the car continue like that, he problem is mainly with the timing belt (seer elkateena ), if this failed the car is in serious trouble, otherwise you can continue with everything else for long time, so it's better and safer to do the maintenance ASAP.
Regarding the Megane "badge" at the rear end i remember it was something like 120 LE, and the original was a bit more
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