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 Check of level of brake fluid  Constant control  
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 In Audi A4 too low level of brake fluid is shown by also control bulb on the control panel, but nevertheless you should not refuse visual control:  Open a cowl and wipe a tank with brake fluid a rag.  Level of brake fluid has to be in a transparent broad tank between the marks "mines" and "max". In this case everything is all right.  |  |  Too low level of brake fluid?  If overlays of disk brakes are already a little erased, then the tendency to lowering of the level of liquid up to the lower mark is looked through; if they new, then liquid level exceeds the top mark again. This absolutely normal phenomenon as at the erased slips moved forward are a little farther pistons of a disk brake leave the bigger volume which is filled with brake fluid in cylinders of brake supports. The situation becomes critical when in a tank the level of brake fluid falls below the mark "mines". As it does not evaporate and is not spent, that is the place of a leakage. Quickly find out the reason, the brake pedal did not refuse yet! Having added will be eyewash!  |