Thanks for your replies, men !
come2me, no problem for me with french (of course...). Just, take care to what other people say ! For your crit on the bottom of the front light, it may be the render setup : have a look in the attached wire, you'll see that mesh is pretty simple there (I think

)
And thanks for yours words ! For the scene, you said you like new renders : what do you think of the following render ? Based on advices given by
NightEye in his dino thread, thanks to him again !
I was using a white background with a bowl. Just added a white plane, darken the sky (50% grey now), and move up the top of the bowl.
SWIPS, thanks a lot ! Nice to read nice comments from you after having seen your work : again, your murcie engine is ... eye-candy ! And too bad for you you don't own the car

And too bad for me my PC can't handle enough polys to work on the engine (already swapping right now when rendering with sufficient mesh smooth)
Enzo is pretty fun to model, once you understood to spend some hours on refpic with a lense

A lot of almost plane surfaces (first approximation, plane, second approximation, first order curves : almost done !)
As always, C&C awaited for my to improve my work and my skills ! Please don't hesitate to critic any flaw you'll see (mesh, materials, render, etc.)