Part identification Discovery 5 Ingenium

[GY2309]

Hi could someone please help me out, what is the engine part in the image attached please? in the red square

Discovery Sport Landmark, Ingenium 2 litre 4x4 Diesel
VIN SALCA2AN1KH813148
REG CE19 CYJ

Thanks very much
Regards
Groggy

 

[Yorkie57]

Possibly oil drain tube?

 

[GY2309]

Possibly oil drain tube?

Thanks very much

 

[Keith_L]

As per your other post it's the filler for the air con gas.

 

[freelance]

Yes schrader valve for aircon refill/ servicing etc , should be a second one somewhere