Hi, I have the same issue. I drive 100 miles a day, every 3rd day or so the coolant will have released through the pressure release valve in the cap of the coolant reservoir. I have replaced this for a new one just in case the valve was weak. Still have the same issue. The heating also is poor. The coolant usually drops whilst driving, I have found this as I get the warning of low coolant level when coming too the end of my commute. I also check after I finish driving and sometimes the level is low at this point too but the warning hasn't popped up yet. Any Ideas of where to look next would be appreciated