Parking System Control Unit, Component Description - GF54.65-P-5004GWM

Model 463 (except 463.342) 

as of Model year 2019 

with code EZ8 (PARKTRONIC Park Assist) 

Shown on Model 463 

Courtesy of MERCEDES-BENZ USA

Location 

The parking system control unit is located behind the left rear wheel well on the side wall.

Tasks 

The parking system control unit has the following tasks:

• Reading in of signals 
• Evaluation of input factors 
• Actuation of components 
• Output of signals 

Reading in of signals 

The input factors are read in via the following connections:

• Direct line 
• HSVL line 
• Chassis FlexRay 

Direct line 

The signals from the following components are read via direct lines:

• Outer left front parking system distance sensor (B8/1)
• Center left front parking system distance sensor (B8/2)
• Inner left front parking system distance sensor (B8/3)
• Inner right front parking system distance sensor (B8/4)
• Center right front parking system distance sensor (B8/5)
• Outer right front parking system distance sensor (B8/6)
• Outer right rear parking system distance sensor (B8/7)
• Inner right rear parking system distance sensor (B8/8)
• Inner left rear parking system distance sensor (B8/9)
• Outer left rear parking system distance sensor (B8/10)
• Center left rear parking system distance sensor (B8/11)
• Center right rear parking system distance sensor (B8/12)

HSVL line 

The picture data for the following components are read in over a high-speed video link (HSVL) line:

• Reversing camera (B84/3) (with code FR8 (Reversing camera))
• Left outside mirror 360° camera (B84/7) (with code JS1 (360° camera))
• Right outside mirror 360° camera (B84/8) (with code JS1 (360° camera))
• Front 360° camera (B84/9) (with code JS1 (360° camera))
• Reversing camera 360° system (B84/10) (with code JS1 (360° camera))

Chassis FlexRay 

The parking system control unit also reads in the following information over the suspension FlexRay (Flex E):

• Circuit 15 status
• Signal "Engine running" or "Drive train operational"
• Wheel speed and wheel rotation direction
• Driving stage engaged
• Electrical power steering control unit status (N68)
• Electric power steering torque sensor (A91b1) signal (toothed rack position)
• Front wheel angle
• Steering torque applied by driver (Hands-off detection status)
• Status of parking space selection
• Speed control/cruise control status
• Parking brake status
• Brake status
• ESP® status
• Trailer operation status
• Blind Spot Assist warning (with code EM4 (Driving Assistance Plus Package))
• Blind Spot Assist brake request (with code EM4 (Driving Assistance Plus Package))
• Steering wheel angle and steering wheel velocity
• Status of PARKTRONIC button
• Accelerator pedal position
• Surround lighting status (with code JS1 (360° camera))

The functions that use these signals are described in the individual function descriptions (see the appropriate block diagram or function schematic).

Evaluation of input factors 

The input factors that have been read in are evaluated by the integrated microprocessor and the relevant components are then actuated.

Actuation of components 

The parking system control unit actuates the parking system distance sensors and the parking system speaker (H13/4) via direct lines.

The signals for activating the Audio/COMAND display are sent by the parking system control unit over the suspension FlexRay. The functions that use these signals are described in the individual function descriptions (see the appropriate block diagram or function schematic).

Output of signals 

The parking system control unit also sends the following information or requests over the suspension FlexRay:

• Status of parking system
• Engaging gear range
• Increase/reduce the braking torque
• Control mode request (speed control/cruise control)
• Request for front wheel angle (steering angle)
• Information on distance to obstacle (remaining distance to obstacle)
• Request for braking mode
• Request for rear camera cover
• Surround lighting request (with code JS1 (360° camera))
• Parking system display in Audio/COMAND display
• Output of system and warning messages

The parking system control unit sends the image data via a HSVL line to the head unit (A26/17).

Variants 

• Parking Pilot Entry (with code FR8 (Reversing camera))
• Parking Pilot High (with code JS1 (360° camera))

Wiring diagram of parking system control unit

PE54.65-P-2107-97ZHA