Mercedes Benz  300 E 1986-1993
 PART   COLOR  LOCATION
 12 VOLT CONSTANT   RED (+)   @ IGNITION SWITCH HARNESS, NOTE #1
 STARTER  PURPLE (+)  @ IGNITION SWITCH HARNESS, NOTE #1
 STARTER 2  N/A  
 IGNITION 1  PINK/RED (+)  @ IGNITION SWITCH HARNESS, NOTE #1
 IGNITION 2  PINK/YELLOW (+) (2ND ACCESSORY)  @ IGNITION SWITCH HARNESS, NOTE #1
 IGNITION 3  N/A  
 ACCESSORY/HEATER BLOWER 1  PINK/GREEN (+)  @ IGNITION SWITCH HARNESS, NOTE #1
 ACCESSORY/HEATER BLOWER 2  N/A  
 KEYSENSE  N/A  
 PARKING LIGHTS ( - )  N/A  
 PARKING LIGHTS ( + )  GREEN/WHITE (+) and GRAY (+) Use both, See NOTE #2  @ HEADLIGHT SWITCH
 POWER LOCK  BLUE or GREEN, See NOTE #3  See DIAGRAM
 POWER UNLOCK  LOCK/UNLOCK uses same wire!  
 DOOR TRIGGER  BROWN/GRAY (-) and BROWN/GRAY/BLACK (-) Use both, See NOTE #4  @ PIN SWITCHES
 DOMELIGHT SUPERVISION  BROWN/GRAY (-)  @ PASSENGERS PIN SWITCH
 TRUNK RELEASE  N/A  
 SLIDING POWER DOOR  N/A  
 HORN  BLACK/YELLOW/PINK (+)  @ STEERING COLUMN HARNESS
 TACH  BLACK (AC)  @ IGNITION COIL
 WAIT TO START LIGHT  N/A  
 BRAKE  BLACK/RED/WHITE (+)  @ BRAKE PEDAL SWITCH
 FACTORY ALARM DISARM   GREEN/YELLOW (-)  @ DIRVERS DOOR HARNESS or THEFT MODULE, See NOTE #5
 ANTI-THEFT  N/A  
 EXTRA INFORMATION
 NOTE#1: You access the IGNITION SWITCH HARNESS by pulling the INSTRUMENT CLUSTER out from the FRONT of the Dash. NOTE #2: this vehicle has 2 Parking Light wires that will require 2 extra Relays part #775, to connect, See DIAGRAM, (BLUE wire is located in a BLACK RUBBER tube whit RED/WHITE and BROWN wires coming out of the DRIVERS DOOR. Passenger side is same except it has a GREEN wire coming out of the BLACK tube. PUMP is located UNDER the REAR SEAT on the PASSENGER SIDE. NOTE #3: this vehicle has aVacuum Door Locking System that will requires 2 extra relays part #775, the wire is a the Drivers kick panel or at the pump under the rear seat, to connect, See DIAGRAM. These wires are in a BLACK tube comming out of the Drivers Door. NOTE #4: the BROWN/GRAY (-) is at the RIGHT PIN SWITCH is for the FRONT DOORS, the BROWN/GRAY/BLACK (-) is at the REAR PIN SWITCH is for the REAR DOORS When connecting to an ALARM SYSTEM use both DOOR TRIGGER wires and DIODE ISOLATE. to connect, See DIAGRAM NOTE #5: the THEFT MODULE is located in the PASSENGER FOOTWELL under the carpet and behind a PLASTIC or WOOD cover against the firewall.