Audi 80/90/Coupe

since 1986-1991 release

Repair and operation of the car

Audi 80/90/Coupe
- 1.2. Identification of the car
   1. Maintenance instruction
   1.3. Arrangement of identification plates
   1.4. Dashboard
   - 1.5. Service of the car
      1.5.2. Seasonal change like fuel
      1.5.3. Petrol additives
      1.5.4. The latest news in the field of fuel
      1.5.5. Cowl
      1.5.6. Engine compartment
      + 1.5.7. Engine oil
      1.5.8. Oil filter of the engine
      + 1.5.9. Automatic transmission liquid
      1.5.10. MKPP oil
      1.5.11. Air filter
      1.5.12. Spark plugs
      + 1.5.13. Hydraulic booster of steering and amplifier of the brake system
      - 1.5.14. Brake fluid Check of level of brake fluid Replacement of brake fluid
      + 1.5.15. Cooling system
      + 1.5.16. Tanks for washers of a windshield and headlights of forward light
      1.5.17. Sprayers
      1.5.18. Brushes of screen wipers
      + 1.5.19. Tires / wheels
   + 1.6. Independent service of the car
   + 1.7. Specifications
   1.8. Capacities
   1.9. Sizes
   1.10. Loadings
   1.11. Schedule of preventive servicing / lubricant of the car
+ 2. Engines, carburetors
3. Lubrication system
+ 4. Cooling system
+ 5. Fuel system
+ 6. Exhaust system
+ 7. System of ignition
+ 8. Transmission
+ 9. Suspension brackets, wheels
+ 10. Brake system
+ 11. Steering
+ 12. Body, salon
+ 13. Air conditioning system
+ 14. Electric equipment Check of level of brake fluid


The correct level of brake fluid is important for operation of the brake system. Level of brake fluid in a tank always has to be between the marks MOVE and MIN. At lowering of the level of brake fluid the alarm bulb of the brake system automatically joins.

Level of brake fluid can go down a little eventually in view of automatic adjustment of brake shoes. It should not be the reason for concern.

If the level of brake fluid falls much below than the mark "MIN", then the alarm bulb of the brake system will light up. In this case, all brake system the cause of lowering of the level of brake fluid has to be carefully checked and removed.


Brake fluid is poisonous. Brake fluid also negatively influences painting of the car.

Do not use brake fluid which absorbed moisture from air or the polluted brake fluid. It can result in premature wear of the brake system or unreliable work of brakes.

Do not add and do not mix the silicone DOT 5 brake fluid with brake fluid in your car as it can lead to serious corrosion of elements of the brake system. Such corrosion can lead to an exit of the brake system out of operation.