Service of Audi A4 from 2001 to 2005 release.
	1. Operation and maintenance of the car
	2. Engine
	3. Transmission
	4. Running gear
	5. Steering mechanism
	6. Brake system
		6.1. Preliminary checks
			6.1.1. Brake disks
			6.1.2. Check of the brake system
			6.1.3. Replacement of brake fluid
			6.1.4. Visual check of the brake system on existence of leakage and damages
			6.1.5. Check of thickness of brake slips
			6.1.6. Check at high and with a low pressure
			6.1.7. Check of residual pressure
			6.1.8. Troubleshooting at unilateral wear of a brake shoe
			6.1.9. Check of the main brake cylinder
			6.1.10. Pumping of the brake system
			6.1.11. Process of removal of air for cars with electronic system of maintenance of course stability (ESP)
		6.2. Repair of the brake system
		6.3. Repair of brakes of forward wheels
		6.4. ABS system
		6.5. Tables
	7. Onboard electric equipment
	8. Body
	9. Schemes of electric equipment

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6.1.5. Check of thickness of brake slips

ATTENTION

Thickness of brake overlays of equal 7 mm (taking into account the metal basis) means that slips reached limit of wear and are subject to replacement (fig. 6.8).

Brake overlays of forward disk brakes

Visually determine thickness of internal brake slips (by a small lamp and a mirror).

a – thickness of brake slips (taking into account the metal basis).

Extreme wear: 7 mm.

Brake overlays of back disk brakes

Fig. 6.9. Visual check of back brake shoes

Visually determine thickness of internal brake slips (by a small lamp and a mirror).

a – thickness of brake slips (taking into account the metal basis).

Extreme wear: 7 mm.

6.1.4. Visual check of the brake system on existence of leakage and damages

6.1.6. Check at high and with a low pressure