Mercedes-Benz E-class W212/S212/C207/A207 facelift (2013-2016) grn/vio Wiring diagrams

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 CAN B H CAN B L 4 3 2 1 SIG 6 7 CAN B L CAN B H AIR RECIRCULATION MODE BUTTON AUTOMATIC AIR CONDITIONING CONTROL, OPERATING UNIT BLU/GRN WIRE BLU/RED WIRE BLU/VIO WIRE BLU/YEL WIRE BRN GRY/ WIRE BRN WIRE BRN/BLK WIRE BRN/GRN WIRE BRN/RED WIRE BRN/YEL WIRE COMPUTER DATA LINES SYSTEM EVAPORATOR TEMPERATURE SENSOR (LOWER RIGHT SIDE OF HVAC EVAPORATOR ASSEMBLY) FRESH AIR/ RECIRCULATED AIR FLAP SWITCHOVER VALVE FRONT SAM CONTROL MODULE W/ FUSE, RELAY MODULE (LEFT REAR OF ENGINE COMPT) FUSE 12 GAS DIESEL GND (-) 31 GRN WIRE GRN/BRN WIRE GRN/VIO WIRE GRN/WHT WIRE GRY/BRN WIRE GRY/ORG WIRE HOT AT ALL TIMES INTERIOR TEMPERATURE SENSOR (LEFT CENTER OF DASH) INTERIOR TEMPERATURE SENSOR W/ INTEGRATED FAN NCA WIRE NTC (+) NTC (-) ORG/BRN WIRE OUTSIDE TEMPERATURE SENSOR (BEHIND CENTER OF FRONT BUMPER) OVERHEAD CONTROL PANEL CONTROL MODULE (W/ TILTING/SLIDING ROOF) OVERHEAD CONTROL PANEL ELECTRONICS (W/O TILTING/SLIDING ROOF) REAR WINDOW HEATER BUTTON RED WIRE RED/BLU WIRE RED/GRY WIRE RED/WHT WIRE REFRIGERANT COMPRESSOR REGULATION VALVE RIGHT FRONT FOOTWELL AIR OUTLET TEMPERATURE SENSOR (RIGHT FRONT FOOTWELL AREA) RIGHT SIDE AIR OUTLET TEMPERATURE SENSOR (IN RIGHT SIDE OF DASH) SIG SIG SOLID STATE SUN SENSOR (TOP CENTER OF DASH) VIO/BLU WIRE VIO/BRN WIRE VIO/GRN WIRE VIO/ORG WIRE VIO/RED WIRE VIO/WHT WIRE VIO/YEL WIRE WHT WIRE WHT/BRN WIRE YEL WIRE YEL/BRN WIRE YEL/VIO WIRE

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 CAN B H CAN B L 30 GND 31 REAR WINDOW HEATER BUTTON 6 7 CAN B L CAN B H AUTOMATIC AIR CONDITIONING CONTROL, OPERATING UNIT BLU/GRN WIRE BLU/RED WIRE BLU/VIO WIRE BLU/YEL WIRE BRN WIRE BRN/BLK WIRE BRN/RED WIRE BRN/YEL WIRE COMPUTER DATA LINES SYSTEM EMISSIONS SENSOR (RIGHT REAR OF ENGINE COMPT) EVAPORATOR TEMPERATURE SENSOR (LOWER RIGHT SIDE OF HVAC EVAPORATOR ASSEMBLY) FRONT SAM CONTROL MODULE W/ FUSE, RELAY MODULE (LEFT REAR OF ENGINE COMPT) FUSE 12 GAS DIESEL GRN/BRN WIRE GRN/VIO WIRE GRN/WHT WIRE GRY/BLU WIRE HOT AT ALL TIMES INTERIOR TEMPERATURE INTERIOR TEMPERATURE SENSOR (LEFT CENTER OF DASH) INTERIOR TEMPERATURE SENSOR W/ INTEGRATED FAN LEFT FRONT FOOTWELL AIR OUTLET TEMPERATURE SENSOR (LEFT FRONT FOOTWELL AREA) LEFT SIDE AIR OUTLET TEMPERATURE SENSOR (LEFT SIDE OF DASH) NCA WIRE ORG/BRN WIRE OVERHEAD CONTROL PANEL CONTROL MODULE (W/ TILTING/SLIDING ROOF) OVERHEAD CONTROL PANEL ELECTRONICS (W/O TILTING/SLIDING ROOF) RED/BLU WIRE RED/GRY WIRE RED/WHT WIRE REFRIGERANT COMPRESSOR REGULATION VALVE REFRIGERANT LINE) REFRIGERANT PRESSURE SENSOR RIGHT FRONT FOOTWELL AIR OUTLET TEMPERATURE SENSOR (RIGHT FRONT FOOTWELL AREA) RIGHT SIDE AIR OUTLET TEMPERATURE SENSOR (RIGHT SIDE OF DASH) SENSOR W/ INTEGRATED FAN SIG SIG LIN GND LIN DATA SOLID STATE SUN SENSOR (TOP CENTER OF DASH) VIO/BLU WIRE VIO/BRN WIRE VIO/GRN WIRE VIO/ORG WIRE VIO/WHT WIRE VIO/YEL WIRE WHT/BRN WIRE YEL/BRN WIRE YEL/VIO WIRE

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 CAN B H CAN B L 4 3 2 1 SIG 6 7 CAN B L CAN B H AIR RECIRCULATION MODE BUTTON AUTOMATIC AIR CONDITIONING CONTROL, OPERATING UNIT BLU/GRN WIRE BLU/RED WIRE BLU/VIO WIRE BLU/YEL WIRE BRN GRY/ WIRE BRN WIRE BRN/BLK WIRE BRN/GRN WIRE BRN/RED WIRE BRN/YEL WIRE COMPUTER DATA LINES SYSTEM EVAPORATOR TEMPERATURE SENSOR (LOWER RIGHT SIDE OF HVAC EVAPORATOR ASSEMBLY) FRESH AIR/ RECIRCULATED AIR FLAP SWITCHOVER VALVE FRONT SAM CONTROL MODULE W/ FUSE, RELAY MODULE (LEFT REAR OF ENGINE COMPT) FUSE 12 GAS DIESEL GND (-) 31 GRN WIRE GRN/BRN WIRE GRN/VIO WIRE GRN/WHT WIRE GRY/BRN WIRE GRY/ORG WIRE HOT AT ALL TIMES INTERIOR TEMPERATURE SENSOR (LEFT CENTER OF DASH) INTERIOR TEMPERATURE SENSOR W/ INTEGRATED FAN NCA WIRE NTC (+) NTC (-) ORG/BRN WIRE OUTSIDE TEMPERATURE SENSOR (BEHIND CENTER OF FRONT BUMPER) OVERHEAD CONTROL PANEL CONTROL MODULE (W/ TILTING/SLIDING ROOF) OVERHEAD CONTROL PANEL ELECTRONICS (W/O TILTING/SLIDING ROOF) REAR WINDOW HEATER BUTTON RED WIRE RED/BLU WIRE RED/GRY WIRE RED/WHT WIRE REFRIGERANT COMPRESSOR REGULATION VALVE RIGHT FRONT FOOTWELL AIR OUTLET TEMPERATURE SENSOR (RIGHT FRONT FOOTWELL AREA) RIGHT SIDE AIR OUTLET TEMPERATURE SENSOR (IN RIGHT SIDE OF DASH) SIG SIG SOLID STATE SUN SENSOR (TOP CENTER OF DASH) VIO/BLU WIRE VIO/BRN WIRE VIO/GRN WIRE VIO/ORG WIRE VIO/RED WIRE VIO/WHT WIRE VIO/YEL WIRE WHT WIRE WHT/BRN WIRE YEL WIRE YEL/BRN WIRE YEL/VIO WIRE

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 CAN B H CAN B L 30 GND 31 REAR WINDOW HEATER BUTTON 6 7 CAN B L CAN B H AUTOMATIC AIR CONDITIONING CONTROL, OPERATING UNIT BLU/GRN WIRE BLU/RED WIRE BLU/VIO WIRE BLU/YEL WIRE BRN WIRE BRN/BLK WIRE BRN/RED WIRE BRN/YEL WIRE COMPUTER DATA LINES SYSTEM EMISSIONS SENSOR (RIGHT REAR OF ENGINE COMPT) EVAPORATOR TEMPERATURE SENSOR (LOWER RIGHT SIDE OF HVAC EVAPORATOR ASSEMBLY) FRONT SAM CONTROL MODULE W/ FUSE, RELAY MODULE (LEFT REAR OF ENGINE COMPT) FUSE 12 GAS DIESEL GRN/BRN WIRE GRN/VIO WIRE GRN/WHT WIRE GRY/BLU WIRE HOT AT ALL TIMES INTERIOR TEMPERATURE INTERIOR TEMPERATURE SENSOR (LEFT CENTER OF DASH) INTERIOR TEMPERATURE SENSOR W/ INTEGRATED FAN LEFT FRONT FOOTWELL AIR OUTLET TEMPERATURE SENSOR (LEFT FRONT FOOTWELL AREA) LEFT SIDE AIR OUTLET TEMPERATURE SENSOR (LEFT SIDE OF DASH) NCA WIRE ORG/BRN WIRE OVERHEAD CONTROL PANEL CONTROL MODULE (W/ TILTING/SLIDING ROOF) OVERHEAD CONTROL PANEL ELECTRONICS (W/O TILTING/SLIDING ROOF) RED/BLU WIRE RED/GRY WIRE RED/WHT WIRE REFRIGERANT COMPRESSOR REGULATION VALVE REFRIGERANT LINE) REFRIGERANT PRESSURE SENSOR RIGHT FRONT FOOTWELL AIR OUTLET TEMPERATURE SENSOR (RIGHT FRONT FOOTWELL AREA) RIGHT SIDE AIR OUTLET TEMPERATURE SENSOR (RIGHT SIDE OF DASH) SENSOR W/ INTEGRATED FAN SIG SIG LIN GND LIN DATA SOLID STATE SUN SENSOR (TOP CENTER OF DASH) VIO/BLU WIRE VIO/BRN WIRE VIO/GRN WIRE VIO/ORG WIRE VIO/WHT WIRE VIO/YEL WIRE WHT/BRN WIRE YEL/BRN WIRE YEL/VIO WIRE

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 CAN B H CAN B L 30 GND 31 REAR WINDOW HEATER BUTTON 6 7 CAN B L CAN B H AUTOMATIC AIR CONDITIONING CONTROL, OPERATING UNIT BLU/GRN WIRE BLU/RED WIRE BLU/VIO WIRE BLU/YEL WIRE BRN WIRE BRN/BLK WIRE BRN/RED WIRE BRN/YEL WIRE COMPUTER DATA LINES SYSTEM EMISSIONS SENSOR (RIGHT REAR OF ENGINE COMPT) EVAPORATOR TEMPERATURE SENSOR (LOWER RIGHT SIDE OF HVAC EVAPORATOR ASSEMBLY) FRONT SAM CONTROL MODULE W/ FUSE, RELAY MODULE (LEFT REAR OF ENGINE COMPT) FUSE 12 GAS DIESEL GRN/BRN WIRE GRN/VIO WIRE GRN/WHT WIRE GRY/BLU WIRE HOT AT ALL TIMES INTERIOR TEMPERATURE INTERIOR TEMPERATURE SENSOR (LEFT CENTER OF DASH) INTERIOR TEMPERATURE SENSOR W/ INTEGRATED FAN LEFT FRONT FOOTWELL AIR OUTLET TEMPERATURE SENSOR (LEFT FRONT FOOTWELL AREA) LEFT SIDE AIR OUTLET TEMPERATURE SENSOR (LEFT SIDE OF DASH) NCA WIRE ORG/BRN WIRE OVERHEAD CONTROL PANEL CONTROL MODULE (W/ TILTING/SLIDING ROOF) OVERHEAD CONTROL PANEL ELECTRONICS (W/O TILTING/SLIDING ROOF) RED/BLU WIRE RED/GRY WIRE RED/WHT WIRE REFRIGERANT COMPRESSOR REGULATION VALVE REFRIGERANT LINE) REFRIGERANT PRESSURE SENSOR RIGHT FRONT FOOTWELL AIR OUTLET TEMPERATURE SENSOR (RIGHT FRONT FOOTWELL AREA) RIGHT SIDE AIR OUTLET TEMPERATURE SENSOR (RIGHT SIDE OF DASH) SENSOR W/ INTEGRATED FAN SIG SIG LIN GND LIN DATA SOLID STATE SUN SENSOR (TOP CENTER OF DASH) VIO/BLU WIRE VIO/BRN WIRE VIO/GRN WIRE VIO/ORG WIRE VIO/WHT WIRE VIO/YEL WIRE WHT/BRN WIRE YEL/BRN WIRE YEL/VIO WIRE

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 CAN B H CAN B L 30 GND 31 REAR WINDOW HEATER BUTTON 6 7 CAN B L CAN B H AUTOMATIC AIR CONDITIONING CONTROL, OPERATING UNIT BLU/GRN WIRE BLU/RED WIRE BLU/VIO WIRE BLU/YEL WIRE BRN WIRE BRN/BLK WIRE BRN/RED WIRE BRN/YEL WIRE COMPUTER DATA LINES SYSTEM EMISSIONS SENSOR (RIGHT REAR OF ENGINE COMPT) EVAPORATOR TEMPERATURE SENSOR (LOWER RIGHT SIDE OF HVAC EVAPORATOR ASSEMBLY) FRONT SAM CONTROL MODULE W/ FUSE, RELAY MODULE (LEFT REAR OF ENGINE COMPT) FUSE 12 GAS DIESEL GRN/BRN WIRE GRN/VIO WIRE GRN/WHT WIRE GRY/BLU WIRE HOT AT ALL TIMES INTERIOR TEMPERATURE INTERIOR TEMPERATURE SENSOR (LEFT CENTER OF DASH) INTERIOR TEMPERATURE SENSOR W/ INTEGRATED FAN LEFT FRONT FOOTWELL AIR OUTLET TEMPERATURE SENSOR (LEFT FRONT FOOTWELL AREA) LEFT SIDE AIR OUTLET TEMPERATURE SENSOR (LEFT SIDE OF DASH) NCA WIRE ORG/BRN WIRE OVERHEAD CONTROL PANEL CONTROL MODULE (W/ TILTING/SLIDING ROOF) OVERHEAD CONTROL PANEL ELECTRONICS (W/O TILTING/SLIDING ROOF) RED/BLU WIRE RED/GRY WIRE RED/WHT WIRE REFRIGERANT COMPRESSOR REGULATION VALVE REFRIGERANT LINE) REFRIGERANT PRESSURE SENSOR RIGHT FRONT FOOTWELL AIR OUTLET TEMPERATURE SENSOR (RIGHT FRONT FOOTWELL AREA) RIGHT SIDE AIR OUTLET TEMPERATURE SENSOR (RIGHT SIDE OF DASH) SENSOR W/ INTEGRATED FAN SIG SIG LIN GND LIN DATA SOLID STATE SUN SENSOR (TOP CENTER OF DASH) VIO/BLU WIRE VIO/BRN WIRE VIO/GRN WIRE VIO/ORG WIRE VIO/WHT WIRE VIO/YEL WIRE WHT/BRN WIRE YEL/BRN WIRE YEL/VIO WIRE

1 2 3 4 5 6 HS(-) ML/K HS(+) ML+ HS(+) MK+ 31 HS(+) HS(-) HS(+) BLK WIRE BLK/BLU WIRE BLK/RED WIRE BLK/YEL WIRE BLU WIRE BLU/RED WIRE BRN WIRE BRN/GRN WIRE BRN/RED WIRE BRN/YEL WIRE CAN B H CAN B L COMPUTER DATA LINES SYSTEM DRIVER SEAT CONTROL UNIT (UNDER DRIVER FRONT SEAT) DRIVER SEAT HEIGHT ADJUSTMENT MOTOR DRIVER SEAT INCLINATION ADJUSTMENT MOTOR DRIVER SEAT LUMBAR SUPPORT ADJUSTMENT CONTROL UNIT (IN DRIVER SEAT BACK) DRIVER SEAT LUMBAR SUPPORT ADJUSTMENT SWITCH DRIVER SEAT LUMBAR SUPPORT PNEUMATIC PUMP GRN WIRE GRN/BLK WIRE GRN/BLU WIRE GRN/VIO WIRE GRY/BLK WIRE GRY/GRN WIRE GRY/YEL WIRE HV MOT+ NV MOT- NV MOT+ LEFT FRONT DOOR CONTROL UNIT LEFT FRONT SEAT ADJUSTMENT SWITCH GROUP (W/ FULLY ELECTRIC SEAT ADJUSTMENT) LV MOT- LV MOT+ HV MOT- MLS H MLS V CAN-B L MLS CAN-B H RED WIRE RED/BLU WIRE RED/YEL WIRE VIO WIRE WHT WIRE WHT/BLK WIRE WHT/BLU WIRE YEL WIRE YEL/BLK WIRE YEL/BLU WIRE

1 2 3 4 5 6 HS(-) ML/K HS(+) ML+ HS(+) MK+ 31 HS(+) HS(-) HS(+) BLK WIRE BLK/BLU WIRE BLK/RED WIRE BLK/YEL WIRE BLU WIRE BLU/RED WIRE BRN WIRE BRN/GRN WIRE BRN/RED WIRE BRN/YEL WIRE CAN B H CAN B L COMPUTER DATA LINES SYSTEM DRIVER SEAT CONTROL UNIT (UNDER DRIVER FRONT SEAT) DRIVER SEAT HEIGHT ADJUSTMENT MOTOR DRIVER SEAT INCLINATION ADJUSTMENT MOTOR DRIVER SEAT LUMBAR SUPPORT ADJUSTMENT CONTROL UNIT (IN DRIVER SEAT BACK) DRIVER SEAT LUMBAR SUPPORT ADJUSTMENT SWITCH DRIVER SEAT LUMBAR SUPPORT PNEUMATIC PUMP GRN WIRE GRN/BLK WIRE GRN/BLU WIRE GRN/VIO WIRE GRY/BLK WIRE GRY/GRN WIRE GRY/YEL WIRE HV MOT+ NV MOT- NV MOT+ LEFT FRONT DOOR CONTROL UNIT LEFT FRONT SEAT ADJUSTMENT SWITCH GROUP (W/ FULLY ELECTRIC SEAT ADJUSTMENT) LV MOT- LV MOT+ HV MOT- MLS H MLS V CAN-B L MLS CAN-B H RED WIRE RED/BLU WIRE RED/YEL WIRE VIO WIRE WHT WIRE WHT/BLK WIRE WHT/BLU WIRE YEL WIRE YEL/BLK WIRE YEL/BLU WIRE

BLK RED/ WIRE BLK WIRE BLK/GRY WIRE BLK/ORG WIRE BLK/VIO WIRE BLK/WHT WIRE BLK/YEL WIRE BLU WIRE BLU/ BRN WIRE BLU/BLK WIRE BLU/RED WIRE BLU/YEL WIRE BRN BLU/ WIRE BRN WIRE BRN YEL/ WIRE BRN/BLK WIRE BRN/BLU WIRE BRN/ORG WIRE BRN/PNK WIRE BRN/VIO WIRE BRN/WHT WIRE BRN/YEL WIRE COUPE DRIVER SEAT BELT BUCKLE RESTRAINT SYSTEMS SWITCH DRIVER SEAT NECK-PRO HEAD RESTRAINT SOLENOID DRIVER SEAT NECK-PRO HEAD RESTRAINT SOLENOID (IN DRIVER'S HEADREST) DRIVER SIDE AIR BAG SQUIB DRIVER SIDE AIR BAG SQUIB (IN OUTER EDGE OF DRIVER FRONT SEAT BACK) FRONT PASSENGER SEAT BELT BUCKLE RESTRAINT SYSTEMS SWITCH FRONT PASSENGER SEAT NECK-PRO HEAD RESTRAINT SOLENOID FRONT PASSENGER SEAT OCCUPIED RECOGNITION, ACSR GRN GRY/ WIRE GRN WIRE GRN/VIO WIRE GRN/YEL WIRE GRY/ GRN WIRE GRY/GRN WIRE GRY/ORG WIRE LEFT FRONT ACCELERATION SENSOR LEFT SIDE AIR BAG SENSOR NCA WIRE PNK WIRE PNK/BLK WIRE PNK/WHT WIRE RED WIRE RED/BLK WIRE RED/BLU WIRE RED/BRN WIRE RED/GRN WIRE RED/VIO WIRE RIGHT ACTIVE ENGINE HOOD SQUIB RIGHT ACTIVE ENGINE HOOD SQUIB (W/ PEDESTRIAN PROTECTION) RIGHT FRONT ACCELERATION SENSOR RIGHT HEAD/THORAX BAG SQUIB RIGHT REAR SIDE AIR BAG SQUIB RIGHT SIDE AIR BAG SENSOR RIGHT WINDOW AIR BAG SQUIB VIO WIRE VIO/BLU WIRE VIO/GRN WIRE VIO/YEL WIRE W/ WEIGHT SENSING SYSTEM W/O WEIGHT SENSING SYSTEM W/O WEIGHT SENSING SYSTEM W/ WEIGHT SENSING SYSTEM WEIGHT SENSING SYSTEM (WSS) CONTROL UNIT WEIGHT SENSING SYSTEM (WSS) CONTROL UNIT (UNDER RIGHT FRONT SEAT) WHT WIRE WHT/BLK WIRE WHT/BRN WIRE WHT/GRN WIRE WHT/VIO WIRE WHT/YEL WIRE YEL WIRE YEL/BRN WIRE

2 2 BNKAE BNKCC SIG SIG 1 1 BLK WIRE BLK/BLU WIRE BLK/VIO WIRE BLU/BLK WIRE BLU/GRN WIRE BLU/GRY WIRE BLU/PNK WIRE BLU/RED WIRE BLU/WHT WIRE BLU/YEL WIRE BNKBB BNKBF SIG SIG 1 1 BRN WIRE BRN/GRN WIRE BRN/GRY WIRE BRN/ORG WIRE BRN/RED WIRE BRN/VIO WIRE BRN/WHT WIRE COOLANT THERMOSTAT HEATING ELEMENT (TOP CENTER FRONT OF ENG) DCP ENGINE COMPT) ENGINE OIL PUMP VALVE (BOTTOM OF ENGINE) FRONT SAM CONTROL MODULE W/ FUSE/RELAY MODULE (LEFT REAR OF FUEL QUALITY SENSOR (W/ ETHANOL FUEL) (UNDER LEFT SIDE OF VEHICLE) FUSE GRN WIRE GRN/BRN WIRE GRN/GRY WIRE GRN/VIO WIRE GRN/WHT WIRE GRY WIRE GRY/BLK WIRE GRY/BLU WIRE GRY/GRN WIRE GRY/PNK WIRE HOT AT ALL TIMES HOT W/ CHASSIS CIRCUIT 87 RELAY ENERGIZED HOT W/ CIRCUIT 15 RELAY ENERGIZED INTAKE MANIFOLD RESONANCE FLAP SWITCHOVER VALVE (RIGHT REAR OF ENGINE) INTAKE MANIFOLD SELECTOR DRUM SWITCHOVER VALVE (RIGHT REAR OF ENGINE) IPM (-1) KWTHS ZUE 6 ZUE 3 ZUE 5 ZUE 6 ZUE 2 LSHK ME-SFI (ME) CONTROL UNIT (LEFT SIDE OF ENGINE) NCA WIRE NWSA 1 NWSE 2 DCM ORG/ WIRE PNK/BLU WIRE PNK/GRN WIRE PNK/RED WIRE PNK/VIO WIRE PNK/WHT WIRE POWER DISTRIBUTION SYSTEM RADIATOR SHUTTERS ACTUATOR (TOP RIGHT REAR OF RADIATOR) RED WIRE RED/BLU WIRE RED/GRN WIRE RED/VIO WIRE RED/YEL WIRE SEDAN WAGON SEDAN, WAGON COUPE, CONVERTIBLE VIO WIRE VIO/BLU WIRE VIO/BRN WIRE VIO/RED WIRE VIO/WHT WIRE WHT WIRE WHT) (OR PNK/ BLK/VIO WIRE WHT) (OR RED/ RED WIRE WHT/BLK WIRE WHT/BRN WIRE WHT/GRN WIRE WHT/GRY WIRE WHT/VIO WIRE WHT/YEL WIRE YEL WIRE YEL/BRN WIRE YEL/GRY WIRE YEL/VIO WIRE ZUE 1 ZUE 4