TC reported air dryer fault at Rear DT car. MR currently at 10 bar, sometimes fluctuates to 9 bar. ~~~~~ #3570 fault code 704. Replace Air Dryer and function test ok. Air Dryer - Old s/n: 3513030012. New s/n: 351521028. Not: 2244047 raised. Done by Haslan/Saini/Haikel  30/01/21.