Leveling or Tramming the bed on your Ender 3 S1 Pro 3d printer is quite a quick easy process, but it's one that can cause some issues if not done right.
In this video i'll show you how to set your spring preload, manually tram your bed and then use the automatic leveling feature to create a bed mesh.

Bed level test stl file: https://www.thingiverse.com/thing:464...

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*I've had quite a few people ask about my Cura start and end gcode for this machine. It's nothing special but feel free to try it if you want (just copy and paste)*

Start Gcode:
; Ender 3 S1 Pro Custom Start Gcode
G92 E0 ; Reset Extruder
G28 ; Home all axes
M420 S1 Z10 ; Use saved Bed Mesh
G1 Z2.0 F3000 ; Move Z Axis up little to prevent scratching of Heat Bed
G1 X0.1 Y20 Z0.3 F5000.0 ; Move to start position
G1 X0.1 Y200.0 Z0.3 F1500.0 E15 ; Draw the first line
G1 X0.4 Y200.0 Z0.3 F5000.0 ; Move to side a little
G1 X0.4 Y20 Z0.3 F1500.0 E30 ; Draw the second line
G92 E0 ; Reset Extruder
G1 Z2.0 F3000 ; Move Z Axis up little to prevent scratching of Heat Bed
G1 X5 Y20 Z0.3 F5000.0 ; Move over to prevent blob squish

End Gcode:
G91 ;Relative positioning
G1 E2 F2700 ;Retract a bit
G1 E2 Z0.2 F2400 ;Retract and raise Z
G1 X5 Y5 F3000 ;Wipe out
G1 Z10 ;Raise Z more
G90 ;Absolute positioning

G1 X0 Y{machine_depth} ;Present print
M106 S0 ;Turnoff fan
M104 S0 ;Turnoff hotend
M140 S0 ;Turnoff bed

M84 X Y E ;Disable all steppers but Z