Brake Pads Warning Light Illuminated

[ben_aip]

Need some help or advise from fellow forum members: I had my 40000km (25k miles) service done 2 weeks ago on my 2010 Q5. Brake pads reported to be 5mm front & 7mm rear, remaining. Service adviser said the front should be good for another 3000 to 4000km. I placed an online order last week for Centric Posi-Quiet and Power-Slotted Rotors last week, but won't be here till another 7 to 10 days (customs clearance, etc). Brake pads warning light came on last night, barely 1000 km after that service report. I need to travel over the Rockies on Wed for a business trip to Alberta(>2500km to & fro). Questions: - When that pad worn light shows, APPROX how far can one continue driving safely before pads replacement? (I know depending on one's driving and terrain), but how much 'meat' are normally left on OEM pads, upon light on? - Could it be a false warning, as I'm not expecting this to occur till maybe another 2000 to 3000 km from 5mm thickness, unless it was not measured right at service 2 weeks ago. - Understanding my dilemma - must drive situation + new pads and rotors on it way in; am I crazy to want to take the risk and make this trip first then fix it when I'm back in town. Thanks one and all.