Audi a6 c6 3.0tdi no crank/no start

[annistyt]

Hello.

I got a audi a6 c6 3.0tdi 2005 model. Some weeks ago the car didn't start after I stopped the car and tried starting it 20 minutes later. I figured it was the starter as it clicked when turning the ignition.
After replacing the starter it still just clicked and didn't start. I found a video on youtube on a audi a8 where the problem was the battery cut of igniter.
I tried checking the igniter with my multimeter, and I found out it was the problem and luckily I had one laying around and changed it.
The car then started immediately and I thought it was over. But just two days later it wouln't start again. This time it doesn't click when turning the ignition and the battery cut of igniter is not the problem.

When using a obd reader I have laying around I get the trouble codes:

05658 - Glow Plug Cylinder 1, Open circuit
05659 - Glow Plug Cylinder 2, Open circuit
05660 - Glow Plug Cylinder 3, Open circuit
05661 - Glow Plug Cylinder 4, Open circuit
05662 - Glow Plug Cylinder 5, Open circuit
05663 - Glow Plug Cylinder 6, Open circuit

I did not have these trouble codes the first time the car didn't start, only after I fixed the first problem.
When reading fuse diagrams online I cannot find a fuse for the glow plugs or one for the starter.

Any ideas what it could be?
Thanks.

[Audibot]

Glow plugs were the first thing I thought. If you can do a visual inspection, in case a rodent did not chew the harness. You should be able to find a fuse diagram somewhere online (sorry I do not have one).

Starter fuse is usually in the engine bay, I believe. Glow plugs maybe there too.