After much G11/G12 confusion concerning my 96 Golf, I tracked down TSB
199601 which says the switch to G12 from G11 for Mexican produced vehicles occurred in January 97. This explains why my original coolant appears blue/green for a car produced in early 96. However the TSB indicates G12 is the preferred formulation but it won't mix with G11. If I drain and flush myself am I unlikely to remove all traces of the existing G11 therefore would it be wise to stick with G11 for the refill? Also my Bentley manual doesn't appear consistent with what I see under the hood. What are the best drainpoints for getting out the maximum amount of old coolant?