ID.4 2021 ➤, ID.5 2021 ➤
Maintenance - Edition 11.2021
♦ Proceed with »If yes« ⇒ page 45
“Digital manual installation aborted - Please try again later”
♦ Switch off vehicle and wait about 5 minutes. Restart proce‐
dure ⇒ page 45 .
“Digital manual installation aborted - Please contact free hotline”
♦ Create a DISS request to do this.
If none of the listed error messages is displayed:
♦ 1) Open help application.
♦ 2) Click user guide button in tab bar of help application.
♦ 3) Is the digital manual application open and are tiles shown
on the home screen?
♦ 4) If yes: End of work instruction.
♦ 5) If the following error message is displayed: “Digital man‐
ual could not be started?”
♦ 6) If yes: Switch off vehicle and wait about 5 minutes. Re‐
start procedure ⇒ page 45 .
4.22
Interior and exterior body: inspecting
for corrosion with doors and flaps open
Test locations
♦ Sliding sunroof frame
♦ Inner and outer door frame
♦ Area around trim strips
♦ Windscreen roof edge
♦ Outer and inner A-pillar
♦ Inner and outer bonnet
♦ Wheel arches
♦ Inner and outer tailgate
46
4. Descriptions of work
ID.4 2021 ➤, ID.5 2021 ➤
Maintenance - Edition 11.2021
4.23
Cooling system: checking frost protec‐
tion and coolant level
Note
♦ Due to the varying constitution of tap water in different coun‐
tries and regions, distilled water must be used for mixing
with coolant concentrate.
♦ Only use coolant additives approved for the vehicle ⇒ Elec‐
tronic parts catalogue (ETKA). Other coolant additives may
reduce corrosion protection substantially. The resulting dam‐
age could lead to loss of coolant and subsequent severe
damage to the motor.
♦ Mixed in the proper proportions, coolant inhibits frost and
corrosion damage as well as scaling. Additives also raise the
boiling point of the coolant. Therefore, the cooling system
must be filled all year round with a coolant additive.
♦ Because of its high boiling point, the coolant improves motor
reliability under heavy loads, particularly in countries with
tropical climates.
♦ The refractometer -T10007A- or refractometer -T10007B-
must be used to determine the current anti-freeze value.
♦ Scale -1- of the refractometer is calibrated for the coolant
additives G12++ and G12evo.
♦ Scale -2- of the refractometer is calibrated for the coolant
additive G13.
♦ If it is not possible to ensure that the same type of coolant
additive is filled: always determine anti-freeze protection us‐
ing the scale for G13.
♦ Anti-freeze protection must be guaranteed down to -25°C as
a minimum and, in countries with arctic conditions, down
to approx. -36°C. Increasing the anti-freeze protection is
permissible only if climatic conditions require stronger anti-
freeze protection. It may, however, be increased only to a
maximum of -48°C. Otherwise, the cooling effect will be im‐
paired.
♦ Do not reduce the coolant concentration by adding wa‐
ter even in warmer seasons and in warmer countries. An‐
4. Descriptions of work
47
2024 VW ID.4 Owner's Manual
