Guys

Slightly strange question but how do you check the coolant level on an RX300 (1MZ FE) Toyota lump ?

It has what I thought was a header tank at one end of the rad with low and max marks but I think it's more a surge/ overflow tank ?

Anyway, there's nothing I can see in this tank but the car runs spot on and dosen't show any signs of getting hot etc even in traffic with the A/C off. Water is flowing through the hoses from feeling them but I'm just concerned I cannot check the level anyhow

Cheers
Paul