diff oil and haldex oil

[Bellic]

i was checking the levels in the haldex unit 6mm allen key at top i stuck in a allen key and there was nothing showing how much oil do these have?
also rear diff oil did same with checker and nothing showing on there , usually in other cars when plug is removed it starts dripping out, also what oil goes in the rear diff ? not haldex unit

 

[claudefrog]

i replaced the haldex filter and oil last week, i just filled it with 300ml,basically the entire tube of oil I bought from vag parts

 

[Bellic]

anyone know about what oil should go in rear diff not haldex unit?