Evening all, My A4 has developed a water leak. It's using about an expansion bottle of water every 200 miles. I've had a good look around the pipes and radiator and cannot see a leak. There's also no water in the oil that i can see. I've got a horrible feeling it could be the water pump because the car makes a belt squeal when the car is started in the morning. My question is, does anyone know how long i can push my luck and drive the car for or is it a potential time bomb waiting to go off. I'm booking it into a garage asap but it's 60 miles away. It's been like this for about 3 weeks now and i've just been topping the water up. Thanks for your advice in advance, Rob.