how much coolant will i need to because i am about to put in an upgraded h/e in my e55 and wanted to make sure i had everything before starting

 

This is a w204 C63 forum. We don't have superchargers.

 

It can depend on the Heat exchanger? are you doing split cooling aswell? I would suggest adding split cooling as you replace the heat Exchanger. for our V2 heat exchanger with split cooling you will need approximately 5l of fluid to fill the system.

you can find our heat exchanger here

http://vrpspeed.com/index.php?route=...ry&path=60_101

 

If the clamp the inlet and outlet hoses while replace the HE then you will not need a whole of coolant.

One HE is fine without split cooling.