Originally Posted by dt604
Light popped on for me last week simple solution. Get a watter bottle fill about half wait note this is a 500ml nestle pure life bottle I am using. Fill water about under half way then put in the coolant from bmw. I bought this for about 26 bux with taxes and brian jessel bmw in van. Before I started pouring the coolant into the bottle I marked it with a black felt pen to now where I should stop. Shake it so it mixes. Pop your hood the coolant tank is on your bottom left side. The coolant cap will require a bit of force to unscrew by hand. Then slowly pour your coolant into the tank. Note that there two symbols to indicate your coolant is top or low there are two images on the container slightly faded but visable. After that twist on the cap close your hood call it a day.
Sounds about right. But I would go to Maranello BMW (Say you are from Maxbimmer to get the discount) and buy the coolant, and then ask them about how to do it as well, you can offer the above explanation to see if they agree. They will be able to verify the above suggestion or offer alternatives.