Steering column module component description - GF54.21-P-6050GZ

MODEL 164.1/8 up to Model Year 8 

Fig 1: Identifying Steering Column Module Component

Courtesy of MERCEDES-BENZ USA

Location 

The steering column module is located on the steering column in the vehicle interior.

Task 

Reading the following switches:

• Combination switch (S4)
  • Left and right turn signal switch (S4s1) (turn signaling/one-touch turn signaling)
  • Wipe switch (S4s5)
  • Windshield washer system switch (S4s4)
  • Rear-end door intermittent wash switch (S4s13)
  • Rear-end door window washer system switch (S4s12)
  • Headlamp flasher/high beam switch (S4s2)
• Steering column adjustment switch (S59)
  • Steering column in/out, up/down
• Steering column adjustment/steering wheel heater switch (S59/1) (only 164.8 with steering wheel heater, code 443)
  • Steering column adjustment up/down, in/out switch (S59/1s1)
  • Steering wheel heater switch (S59/1s2) (only 164.8 with steering wheel heater, code 443)
• DIRECT SELECT gear selector switch (S16/13)
  • actuated in vertical direction (drive positions)
  • R - Reverse
  • N - Up - Neutral
  • 0 - Park position
  • N - Down - Neutral
  • D - Forward
• actuated in axial direction
  • P - Park pawl engaged
• Cruise control switch ( S40, except S40/4)
• DTR distance potentiometer ( S40r1, except S40/4r1)
• Steering angle sensor (N49)
• Switches of multifunction steering wheel

Communication between the steering column module and steering wheel takes place over the LIN bus (Local Interconnect Network).

The steering angle sensor no longer has to be initialized with circuit 30 "OFF".

Actuation of:

• Steering wheel heater function illumination (only 164.8 with steering wheel heater, code 443)
• Switch and controls illumination in multifunction steering wheel (controlled via LIN bus)

The voice control system is designed as a preinstallation (dealer option) and is special equipment for the multifunction steering wheel.