07 grand scenic dci side light bulb

Hi and thank you for letting me join the forum. I have an 07 Grand Scenic 1.5 dci which is a fantastic car which I thoroughly enjoy and have owned for 2 months. My side light bulb has blown and the parts chap and the manual says that it should be a w5w but mine appears to be a bayonet fit and not a slide fit. What bulb do I need then? Many thanks. Pete

07 grand scenic dci side light bulb