4 Descriptions of work
Swivel joints, axle mountings, coupling rod bearings and anti-
roll bar rubber mountings: visual check for damage ⇒ page 17
Privacy notice sticker: attaching ⇒ page 20
Automatic headlight control and static cornering light: checking
function ⇒ page 21
Battery (12V): checking battery terminal clamps for secure seat‐
ing ⇒ page 22
Battery (12V): checking ⇒ page 23
Status of battery (12V): reading - sending diagnosis protocol via
online connection ⇒ page 24
Front passenger airbag: checking key switch and “ON/OFF
function” ⇒ page 25
Tyres: checking condition, wear pattern, tyre pressure and tread
depth ⇒ page 26
Brake system: changing brake fluid ⇒ page 30
Brake system and shock absorbers: inspecting for leaks and
damage ⇒ page 34
Brake fluid level: checking ⇒ page 35
Front brake discs and rear drum brake pads: check thickness of
pads and condition of discs ⇒ page 36
Window regulators: checking positioning (open and close func‐
tions) ⇒ page 39
Fault memories of all systems: reading with vehicle diagnostic
tester and correcting possible faults according to repair guide‐
lines ⇒ page 40
Protective bellows: inspecting ⇒ page 40
High-voltage battery: check charge level ⇒ page 41
Maintenance of high-voltage battery ⇒ page 41
High-voltage battery: charging ⇒ page 41
High-voltage components and high-voltage cables: inspecting
for damage and correct routing and securing of lines ⇒ page
41
Infotainment system: installing Digital Manual ⇒ page 42
Interior and exterior body: inspecting for corrosion when doors
and flaps are open ⇒ page 43
Cooling system: checking frost protection and coolant level ⇒
page 45
Engine and components in engine compartment: inspecting for
leaks and damage (from above and below) ⇒ page 47
Motor compartment cover (noise insulation) “bottom”: removing
and installing ⇒ page 48
Road test (performance, handling, noises, air conditioner etc.):
carrying out ⇒ page 48
Wheel securing bolts: tightening to specified torque ⇒ page 49
Tyre Pressure Loss Indicator: calibrating ⇒ page 50
Tyre repair set: checking ⇒ page 51
ID.4 2021 ➤
Maintenance - Edition 12.2020
16 4. Descriptions of work
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