If your trailer is equipped with a braking system, make sure it conforms to your country’s regulations and that it is properly installed and operating correctly.
If your trailer weight exceeds the maximum allowed weight without trailer brakes, then the trailer will also require its own brakes as well. Be sure to read and follow the instructions for the trailer brakes so you’ll be able to install, adjust and maintain them properly.
• Do not tap into or modify your vehicle's brake system.
WARNING - Trailer brakes
Do not use a trailer with its own brakes unless you are absolutely certain that you have properly set up the brake system. This is not a task for amateurs. Use an experienced, competent trailer shop for this work.
Kia Cee'd JD Service Manual: Crash Pad Side Cover Components and components location
Component Location
[LH]
1. Crash pad side cover [LH]
[RH]
1. Crash pad side cover [RH]
...
Kia Cee'd JD Service Manual: Height Sensor Repair procedures
Removal
1.
Disconnect the negative (-) battery terminal.
2.
Disconnect the head lamp height sensor connector.
3.
Remove the assist arm (A).
4.
Remove the head lamp auto level ...