I : Inspect and if necessary, adjust, correct, clean or replace.
R : Replace or change.
*1 : If TOP TIER Detergent Gasoline is not available, one bottle of additive is
recommended. Additives are available from your authorized HYUNDAI dealer along with
information on how to use them. Do not mix other additives.
*2 : The drive belt should be replaced when cracks occur or tension is reduced excessively.
*3 : Fuel filter & Fuel tank air filter are considered to be maintenance free but periodic inspection is recommended for this maintenance schedule depends on fuel quality. If there are some important safety matters like fuel flow restriction, surging, loss of power, hard starting problem, etc. replace the fuel filter immediately regardless of maintenance schedule and consult an authorized HYUNDAI dealer for details.
Hyundai Elantra AD (2016-2020) Service Manual: Components and Components Location
Components
1. Rear seat back assembly [LH]2. Rear seat back assembly [RH]3. Rear back armrest4. Rear seat cushion assembly
...
Hyundai Elantra AD (2016-2020) Owners Manual: Power Windows
The ignition switch must be in the ON position to be able to raise or lower the
windows. Each door has a Power Window switch to control that door's window. The
driver has a Power Window Lock switch which can block the operation of passenger
windows. The power windows will operate for appro ...