(Component Description For Electronic Stability Program Control Unit - GF42.45-P-5119FGH)

Model 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 on the traction system hydraulic unit in the left of the engine compartment in the engine compartment, next to the BAS brake booster (A7/7).

Tasks 

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

• Regenerative braking system (RBS)
• Electric parking brake
• Electronic Stability Program (ESP®)
• Electronic brake force distribution (EBD)
• Anti-lock braking system (ABS)
• Acceleration slip regulation (ASR)
• 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
• 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 
• Suspension FlexRay (Flex E) 
• Vehicle dynamics CAN (CAN H) Direct line 

The following signals are read in via direct lines:

• Circuit 30
• Circuit 31
• Pedal angle sensor (B37/1)
• Dual brake vacuum sensor (B150/2)
• 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)
• Traction system hydraulic unit
• Master brake cylinder pressure sensor (A7/3b1)

Chassis FlexRay 

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

• Instrument cluster (A1)
• Active Brake Assist controller unit (A108) (with code 258 (COLLISION PREVENTION ASSIST))
• DISTRONIC Distance Pilot controller unit (A108/1) (with code 239 (DISTRONIC PLUS))
• Supplemental Restraint System control unit (N2/10)
• CDI control unit (N3/9) (with diesel engine)
• ME-SFI control unit (N3/10) (with gasoline engine)
• 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 with PARKTRONIC) or with code P44 (Parking Package))
• Mercedes-Benz Intelligent Drive control unit (N62/4) (with code 23P (Driving Assistance Package))
• 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:

• Traction system hydraulic unit
• Electric vacuum pump (M56)
• Left electric parking brake actuator motor (M76/1)