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ID.4 2021 ➤
Maintenance - Edition 12.2020
Do not reduce the coolant concentration by adding wa‐
♦
ter even in warmer seasons and in warmer countries. An‐
ti-freeze protection must be guaranteed down to at least
-25°C.
The temperature reading on the refractometer corresponds
♦
to the »ice flocculation point«. Flakes of ice may start form‐
ing in the coolant below this temperature.
Do not reuse old coolant.
♦
Use only a water/coolant additive mixture as a slip agent for
♦
coolant hoses.
4.22.1
Frost protection: checking, replenishing
coolant additive if necessary
Special tools and workshop equipment required
♦ Refractometer -T10007A-
♦ Refractometer -T10007B-
Note
Read precise value for the following tests at light-dark border.
Using a pipette, place a drop of water on the glass to improve
the readability of the light-dark border. The light-dark border can
be clearly recognised on the "WATERLINE".
– Check concentration of coolant additive using refractometer
(refer to operating instructions).
The scale -1- of the refractometer is calibrated for the coolant
additives G12++ and G12evo.
The scale -2- of the refractometer is calibrated for the coolant
additive G13.
– If frost protection is insufficient, drain some coolant and top
up with coolant additive
46
4. Descriptions of work
⇒ page 47
.
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