WARNING
Always follow these instructions when recharging your vehicle’s battery to avoid the risk of SERIOUS INJURY or DEATH from explosions or acid burns:
By jump starting
After a jump start from a good battery, idle the vehicle with the headlights turned ON for 20-30 minutes before started driving. The vehicle may not run properly if you drive it off before the battery had a chance to adequately recharge. See "Jump Starting" in chapter 6 for more information on jump starting procedures.
Information
An inappropriately disposed battery can be harmful to the environment and human health.
Dispose the battery according to your local law(s) or regulation.
Hyundai Sonata LF 2014-2019 Service Manual: Timing Chain Cover Repair procedures
Removal
•
Use fender covers to avoid damaging painted surfaces.
•
To avoid damage, unplug the wiring connectors carefully while holding the connector portion.
Mark all wiring and hoses to avoid misconnection.
...
Hyundai Sonata LF 2014-2019 Service Manual: License Lamps Repair procedures
Removal
1.
Disconnect the negative (-) battery terminal.
2.
Remove the trunk lid panel.
(Refer to Body - "Trunk Lid Trim")
3.
Remove the license lamp after disengaging the license lamp mounting clip (A).
4.
Remove the license lamp assembly after disconnect the license connector (A). ...