Adding detail at door.

1. Add an edge with 'loop slice'.

1. Add an edge with ‘loop slice’.


 
2. Select that edge and click on Edge / 'Extend' (press 'z' key)

2. Select that edge and click on Edge / ‘Extend’ (press ‘z’ key)


 
3. Move and scale that edge like this picture.

3. Move and scale that edge like this picture.


 
4. Add an edge with 'Edge Slice' (press 'c' key)

4. Add an edge with ‘Edge Slice’ (press ‘c’ key)


 
5. Select that edge and 'Extend'

5. Select that edge and ‘Extend’


 
6. Move and scale that edge like this picture.

6. Move and scale that edge like this picture.


 
7. Add an edge with 'Edge Slice' (press 'c' key)

7. Add an edge with ‘Edge Slice’ (press ‘c’ key)


 
8. Add an edge with 'loop slice'.

8. Add an edge with ‘loop slice’.


 
9. Select those two edges and Duplicate / 'Bridge'

9. Select those two edges and Duplicate / ‘Bridge’


 
10. Add these two edges with 'Edge Slice'

10. Add these two edges with ‘Edge Slice’


 
11. Select these polygons and press F11(Snapping) and Click on Constraint Mode / Backgound. And make sure 'Germetry Constraint : Vector.

11. Select these polygons and press F11(Snapping) and Click on Constraint Mode / Backgound.
And make sure ‘Germetry Constraint : Vector.


 
12. Move that polygons along X axis (red arrow), it'll snap to backgound geometry. And Turn off the snapping.

12. Move that polygons along X axis (red arrow), it’ll snap to backgound geometry.
And Turn off the snapping.


13. Add edges for grill space.

13. Add edges for grill space.


 
14. Bevel twice and move polygons.

14. Bevel twice and move polygons.


 
15. Add and edge for bumper. Selete these polygons and 'Bevel'

15. Add and edge for bumper. Selete these polygons and ‘Bevel’