ASR I 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 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 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 II 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 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 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)