Gents,
I recently got a message on my 05 Db9 that my engine coolant is low. Im sure this is something I can fix myself but does anyone know what type and how much I am supposed to out in and where it can be bought? Thanks

 

If you just need to top it off, use distilled water. However, since your car is a 2005 and probably hasn't had its 5 year coolant flush I would go ahead and have this service done.

 

+1, Until you can get around to having the flush, just add Distilled water. No need to add coolant, adding the wrong coolant could cause problems, and adding distilled water causes no problems at all.