Checking the free play (backlash) of the steering wheel on a Volkswagen Polo car

With an increased free play of the steering wheel, it is difficult to control the car, as it responds to the driver's actions with a delay. In addition, increased travel, which cannot be eliminated by adjusting the steering gear, indicates a steering malfunction (weakening of the steering gear, steering rods or wear of their parts).
Check steering wheel play with the vehicle parked on a level, non-slip surface. The play must not exceed 5°. You can also determine the backlash in linear units (mm) by the formula
L = (5/360)pD,
where L is the steering wheel backlash, mm; l = 3.14; D - outer diameter of the steering wheel, mm.
For a steering wheel with an outer diameter of 370 mm, the play must not exceed 16 mm.
You will need: ruler, chalk (or tape) for marking.

1. Set the front wheels to a straight ahead position.
2. Install the ruler so that it is firmly fixed on the instrument panel, and the plane of the ruler touches the outer surface of the steering wheel rim.
3. Without changing the position of the ruler, turn the steering wheel to the right until the front wheels begin to turn. Mark the steering wheel rim in this position.
4. Without changing the position of the ruler, turn the steering wheel to the left until the front wheels start to turn ...
5. ... and in this position, put a second mark on the steering wheel rim.

6. Measure the distance between the marks along the rim. It should not exceed the calculated value. If the distance (steering wheel free play) is greater, the cause must be determined and rectified.

Source: http://www.polosdn.ru/news/rulevoe_upravlenie_polo_sedan/2012-06-15-110