Also, once warmed up with the heater on, leave the heater on and set to high when draining.

As for the difference between blue and yellow, well I reckon that depends on where you live. Many places outside of the US get the blue colored coolant (Phillipines comes to mind), apparently if it has the MB label it is basically the same stuff, just different color.

__________________
Mike Tangas
'73 280SEL 4.5 (9/72)- RIP
Only 8,173 units built from 5/71 thru 11/72

'02 CLK320 Cabriolet - wifey's mid-life crisis

2012 VW Jetta Sportwagon TDI...at least its a diesel

Non illegitemae carborundum.