You can start the engine without inserting the key.
NOTICE
To prevent damaging the smart key:
NOTICE
Always have the smart key with you when leaving the vehicle. If the smart key is left near the vehicle, the vehicle battery may be discharged.
Hyundai Sonata LF 2014-2019 Service Manual: Transmission Gear Oil Repair procedures
Inspection
•
In principle, the transmission oil is maintenance-free, and no exchange is required.
But it must be inspected and replenished every 4 years or 40,000 miles.
1.
Park the vehicle on flat ground and turn off the engine.
2.
Remove the under cover.
...
Hyundai Sonata LF 2014-2019 Owners Manual: Air Bag - Advanced Supplemental Restraint System
1. Driver's front air bag
2. Passenger's front air bag
3. Side air bag
4. Curtain air bag
5. Driver's knee air bag
This vehicle is equipped with an Advanced Supplemental Air Bag System for the
driver's seat and front passenger's seats.
The front air bags are designed to supplement the three-point ...