EGR for ML350BT 2012 W166.
Can anyone tell my about this EGR valve A642 140 21 60 for ML350BT W166. Someone told my coolant cirkulate to cool the valve, but I can just se one connector for hose.. And I sucpect this is for vacuum.
The question is:
1. Is the valve vacuum operated or electrical operated?
2. Is the valve cooled by the cars coolant?




