2004 Renault Megane entitlement

You will have to check local authorities regarding this, check with local consumer protection authorities, here in Australia it is not mandatory to do it, some do some don't, it is just a matter of good will, some work shops don't have loan cars, this is just something that you will have to work out between the mechanic and yourself, but he should be doing all he can to make a speedy repair and get your car back to you.