I have a 1998 Audi A4 1.8T and i filled up the coolant resevoir and took a road trip from AZ to Texas along the way the coolant light came on and i found it to be low so i filled up again and continued my drive. I arrived in TX and left my car for about a week in the driveway then got back in to drive and again about ten minutes down the road the warning came on and i found it to be low. I cannot find a point of leak and have no idea where to start in finding what the problem or leak may be. Any help would be great.
Thanks,
John

 

are you running g12 coolant?

 

i had a similar problem, im still nto sure but i went to my local NAPA and got some Bar's liquid aluminus raditor stop leak, worked like a charm. its been 2 weeks now and the level hasent gone down, hopefully the issues isnt serious where it will need major repair but for the time being this a is fairly good permanant solution until you drain the raditor.