Modeling the windshield

We start with the windshield. Remember that we only need to model half of it! We start to build the windshield rubber seal first and we build the actual windshield from that. First we duplicate the Roof and the Door_right objects. Delete all faces from these duplicates (or points depending on your edit mode), except the ones on the inside. See next two images:

   
Delete these points (roof top view)    and you need these faces from the copied Door_right object

Note that the copy of the door object and the copy of the roof do not have the same width, so we need to fix that. We will modify the copy of the door object so it gets the same width as the copy of the roof object. Select the copy of the door object and go in Point Edit mode. Then select all the lower points and move them up, so the object gets the same width as the roof object. See next two images:

Select these points of the copy of the door (side view)..

move them upwards, so the object gets the same width as the copy of the roof..

Next, select both the copy of the roof and the copy of the door objects and merge them using the 'MergeO' (merge objects) tool. Rename the new object as 'Window rubber seal'. The next step is to merge the points in the corner of the former two objects. You may need to move former roof points closer to the corner first. Select the two top points and merge them, then select the two lower points and merge these too. In the Property window set both the Edge Sharpness and Vertex Sharpness to 'Sharp'.

Merge corner points, first top ones, then the lower ones..

Now switch to Face Edit mode and select all faces. Check and make sure that all face normals point towards the windshield (thus: inwards). See next image. If face normals point in the other direction, select the relevant faces and apply the Flip tool in the SDS toolbar to make the face normals point the other way.

All face normals point inwards (top view)

All selected faces are now extruded slightly inwards and for all edges the Edge sharpness is set to 'Semi sharp'. This finishes the modeling of the Windshield rubber seal object. See next image, showing only the modeled part (not the instanced part):

All faces extruded, edge sharpness set to Semi sharp.

To model the actual windshield object, duplicate the Windshield rubber seal object first. Rename the new object to 'Windshield'. Then we model the windshield from the inner edges of the top faces. In Edge Edit mode select all inner edges on the roof side of the Windshield and create new faces as usual and make sure it matches the right hand side of the seal.

Select only the inner edges to model the windshield..  (top view)

   
Build the mesh and make sure it is aligned to the blueprint in all views..

Now save your project before continuing.