I have a 2001 1.9 tdi auto galaxy. The other day a message saying STOP appeared on the dash, check coolent, I did and sure enough the expansion bottle was almost empty, i filled it back to the max line and have drove it about 130 miles and the same message appeared today, and yet again barely any coolent in the expansion bottle. Odly i am not having any overheating problems, there is no steam pouring out the bonnet and everything seems to be running fine. I am worried that I will cause greater damage if i continue to drive it. Are there any common areas where the fault will be, any suggestions anyone?? many thanks, Tone. P.S) funny car went in for an oil change last week, now the problems here, maybe just coincidence!