Inlet manifold wiring connectors and lamda sensor

[dub-disaster]

On the braket on the inlet manifold there are ment to be three connectors on it I have the lambda and the knock sensor but I have forgotten which other one goes on this braket any ideas any one ?
    Also lamda sensor is it worth changing it whilst it's easy to change ?? The one I have the boss is very rusty the sensor looks ok apart from the fact it's spade crimped half way through then insulated with tape. I know there expensive that's why I don't want to have to replace it unless I have to. If you lamda sensor starts to brake what are the simptoms ?? 

[grungeisdead]

afaik its the harness for the starter motor/alternator wiring. a duff lambda will give you shit fuelling and running. vag-com should tell you if its duff

[dub-disaster]

Perfect, cheers for that completley forgot about that starter wiring harness.

[Jezza-7]

You can get a good bosch one from ebay for around £50.