How to check if an A8 has servotronic, plus, where is the relay?

[Julian Thompson]

A8 4.2 tdi lwb 2008 - I assumed it would have servotronic. Checked the relays under the passengers feet and the ones behind the fuse box up under the dashboard. No sign of relay 605 anywhere. On vcds I just get “module not responding” - seems to me it doesn’t have servotronic, but I thought they all did after the .3 revision in 08?

Thanks in advance.