Component Description For Electronic Stability Program Control Unit - GF42.45-P-5119FG

Model 213 (except 213.016/050/053/153/216) up to model year 2021 

Shown on model 213.0 

Courtesy of MERCEDES-BENZ USA

Location 

The Electronic Stability Program control unit is located in the engine compartment, at the left next to the BAS brake booster (A7/7) on the traction system hydraulic unit (A7/3).

Tasks 

The Electronic Stability Program control unit contains the control for the following systems:

• ADAPTIVE BRAKE
• Electric parking brake
• Electronic Stability Program (ESP®)
• Electronic brake force distribution (EBV)
• Antilock brake system (ABS)
• Acceleration skid control (ASR), electronic traction system (ETS)
• Brake Assist System (BAS)
• Brake Assist System PLUS (BAS PLUS) (with CODE 23P (Driving assistance package))
• Hill Start Assist
• Adaptive brake lights, flashing (except with CODE 494 (USA version))
• Dry braking
• Precharging, depending on accelerator pedal actuation
• Precharging, depending on lateral acceleration
• HOLD function
• ESP® trailer stabilization (with CODE 550 (Trailer hitch))
• PRE-SAFE® system (with CODE 23P (Driving assistance package))
• Standstill control (SSC)
• Steer Assist
• Tire pressure loss warning (RDW) Tire pressure monitor (with CODE 477 (Tire pressure loss warning))
• Variable speed limiter (except CODE 23P (Driving assistance package))
• Cruise control (except CODE 23P (Driving assistance package)) The Electronic Stability Program control unit has the following tasks:
• Reading in of signals 
• Evaluation of input factors 
• Actuation of components Reading in of signals 

The input factors are read in via the following connections:

• Direct line 
• Chassis FlexRay (Flex E) Direct line 
• Brake vacuum sensor (B150)
• Left front axle rpm sensor (L6/1)
• Right front axle rpm sensor (L6/2)
• Left rear axle rpm sensor (L6/3)
• Right rear axle rpm sensor (L6/4)
• Electrical parking brake switch (S76/15)
• Brake lights switch (S9/1)

Chassis FlexRay 

The Electronic Stability Program control unit is a subscriber to chassis FlexRay. It communicates with the following control units:

• Instrument cluster (A1)
• Supplemental Restraint System control unit (N2/10)
• CDI control unit (N3/9) (with diesel engines)
• ME-SFI [ME] control unit (N3/10) (with gasoline engines)
• Front SAM control unit (N10/6)
• Rear SAM control unit (N10/8)
• Trailer recognition control unit (N28/1) (with code 550 (Trailer hitch))
• Parking system control unit (N62) (with code 235 (Parking Pilot) or with code P44 (Parking package))
• Mercedes-Benz Intelligent Drive control unit (N62/4) (with code 23P (Driving Assistance Package) or with code 292 (PRE-SAFE® Impulse side))
• Electrical power steering control unit (N68)
• Left front door control unit (N69/1)
• Electronic ignition lock control unit (N73)
• Steering column tube module control unit (N80)
• Powertrain control unit (N127)
• Fully integrated transmission control unit (Y3/8n4)

Vehicle dynamics CAN 

The Electronic Stability Program control unit is a subscriber on the vehicle dynamics CAN. It communicates with the following control unit:

• Supplemental restraint system control unit

Evaluation of input factors 

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

Actuation of components 

Components are actuated with the following line:

• Direct line 

Direct line 

The following components are actuated via direct lines:

The following signals are read in via direct lines:

• Circuit 30
• Circuit 31
• Traction system hydraulic unit
• Traction system hydraulic unit
• Left electric parking brake actuator motor (M76/1)
• Right electric parking brake actuator motor (M76/2)