In order to retrofit lashing eyelets, two of each of items pictured in post #2 above are required (i.e. two front eyelets, two bolts for the front eyelets, and two rear eyelets).
Each part number is for a bag containing ONE unit only.
Notes regarding cargo nets:
1. The floor cargo net hooks to the lashing eyelets. The eyelets are therefore a must for the floor net.
2. The side nets do not hook to the lashing eyelets, they come with their own four fittings, two for the top and two for the bottom. The side nets can therefore be fitted regardless of whether the car is equipped with lashing eyelets or not.
3. The sill net comes with its own two fitting for the top part, and the instructions recommend that the bottom of the sill net is hooked to the lashing eyelets. However, this is optional - the bottom of the sill net can be left hanging loose (securing the hooks back onto the net). Also, the side nets share the fitting at the top with the sill net, meaning that where both side net and sill net are purchased, one fitting for each side is left in the bag as spare.
The part numbers above are for C-Class Saloon W203 1999-2007, however the same setup is available for many other models e.g Sport Coupe, CLC, etc. The principal is the same, it is just a question of finding the correct part numbers for the eyelets and for the nets for the specific model of car.