Contents: Front mudguard ⬇ Rear mudguard ⬇
Front mudguard

Remove the wheel. Unscrew the screws "3" from the spacer inserts "2". Remove the mudguard "1" from the body "4".
Installation
Note: Check the expansion nuts "2" for damage and replace if necessary.
Insert the mudguard "1" into the wing. Screw in the screws "3". Tightening torque: 2 Nm
Rear mudguard

Remove the wheel. Unscrew the screws "3" from the spacers "2". Remove the rear mudguard "1".
Installation
Danger! Check and, if damaged, replace the spacer inserts "2". The spacer inserts are plugs that isolate the passenger compartment from the ingress of exhaust gases. If damaged, they must be replaced.
[Text taken from this website SkodaBook.ru]
Insert the rear mudguard "1" into the wheel arch, avoiding deformation. Screw in the screws "3". Tightening torque: 2 Nm. Install the wheel.
