You will need at least 2 hours to do this.
There are different types of angel eyes on the market. I highly recommend CCFL rings, because they shine better than LED and are higher quality made.
Things what is necessary to install E36 CCFL angel eyes, before you start to work - screwdriver, pair of keys. And certainly angel eyes.
This is how it should look if you have 6 cilinder engine.
1. First - Unscrew away plastics laid on.
2.Before to take a headlight out, you need to remove corner light, which you can take out pushing with a screwdriver on special click on corner light. It is difficult to look over, but if look intently should find it. It goes about here:
3.Farther you need to unscrew the headlight, which is screwed on with 5 screw-bolts - 3 upwards and one in each side (one you can see picture above).
4.Next you need to divide headlight in two departments. Both in a bottom and upwards there are clicks, which are necessary to be opened, upper them with the flat screwdriver.
5.Next you need to remove glasses. You can do it, easy with a knife cutting out the old silicon.
6. Now insert CCFL ring in to a front part of a headlight and you mission almost finished. Now you just need to make space for CCFL wiring and get all parts back to your car.
WARNING - CCFL rings are very easy to damage so be gentle.