Antilock Brakes / Traction Control Systems: Application and ID

NOTE: For model name/model number cross reference refer to Model Designation Table. Application and ID

ASR I
Usage
Model 126 as of 10/87 up to 08/89

Features
^ Separate hydraulic unit for ABS and ASR
^ ASR storage pressure supply from separate charge pump
^ ASR control functions
- Brake intervention
- Throttle valve return

ASR II
Usage
Model 124 (except 124.034/036) as of 01/90
Model 126 as of 09/89
Model 129.060/061/066 as of start of production
Model 201.029 as of 06/90

Features
^ ABS and ASR hydraulic unit combined into a compact hydraulic unit
^ ASR storage pressure supply from charge pump in the hydraulic unit and additional charging pump
^ Model 124 as of 09/92 EFP with fault memory
^ ASR control functions
- Brake intervention
- Throttle valve return

ASR III
Usage
Model 124.034/036 as of start of production
Model 129.058/063/067/076 as of start of production
Model 140 as of start of production
Manual transmission (as of 10/93)

Features
^ Hydraulic design as for ASR 11
^ ASR with MSR = engine braking regulation
^ Vehicles with module box in engine compartment
^ System linking of ASR, EFP and HRM or LH control modules and EZL/AKR control module via CAN data line.
^ System with diagnostic fault memory (fixed memory)
Fault can be read out/erased via the data link connector (38-pin) with pulse counter or via
Hand-Held-Tester
^ ASR control functions
- Brake intervention
- Throttle valve return
- Advance angle adjustment - retarded
^ MSR control function
- Throttle valve opening

ASR IV
Usage
Model 202.028 as of start of production
Manual transmission (as of 10/93)

Features
^ Hydraulic unit with two 2/2-way valves per wheel
^ Uprated charging pump in wheelhouse of left front fender
^ Hydraulic function without pressure accumulator, pressure switch and charging pump
^ Internal venting sequence of ASR hydraulics
^ Brake fluid reservoir with additional ASR brake fluid check switch and return line from ASR hydraulic unit
^ System linking of ASR, EFP and HFM control modules via CAN data line
^ ASR with MSR = engine braking regulation System with diagnostic fault memory (fixed memory)
Fault can be read out/erased via the data link connector (38-pin) with pulse counter or via Hand-Held-Tester
^ ASR with manual transmission (as of 10/93)
^ ASR control functions
- Brake intervention
- Throttle valve return
- Advance angle adjustment - retarded
^ MSR control function
- Throttle valve opening

ASR V
Usage
Model 129 as of 06/94
Model 140 as of 06/94
Model 168 as of start of production
Model 170 as of start of production
Model 202 as of 06/94
Model 208 as of start of production
Model 210 as of start of production
Automatic and manual transmission

Features
^ Hydraulic design with 2/2-way valves as ASR IV
^ ASR with EBR = Engine Braking Regulation
^ Self-priming high-pressure/ return pump
^ Hydraulic function without charging pump
^ No additional brake bleeding for ASR
^ Normal brake fluid reservoir
^ ASR OFF switch (ASR OFF)
^ Flashing ASR warning lamp
^ System networking of ASR, EA, ETC and HFM-SFI, LH-SFI, ME-SFI or MSM control modules and if necessary, DI/KSS control unit via CAN data bus
^ System networking with instrument cluster via CAN data bus (as of approx. 01/96)
^ System with diagnosis fault memory (read-only storage)
The fault memory can be read out/erased via the data link connector using the Hand-Held Tester
^ ASR control functions
- Brake intervention
- Throttle valve return (except diesel engine and gasoline engine with fuel shut-off)
- Advance angle adjustment - retarded (except diesel engine and gasoline engine with fuel shut-off)
- Fuel shut-off (gasoline engine with fuel shut off)
- Fuel quantity cancellation (diesel engine)
^ EBR control function (except gasoline engine with fuel shut-off)
- Throttle valve opening (gasoline engine)
- Fuel quantity increase (diesel engine)