Mercedes-4-R-V-IE Installation Manual The 123MERCEDES-4-R-V is designed for the W110, W115 and W123 4 cylinder engines, in the Mercedes : – 190C– 200– 220– 220US– 230 This unit offers vacuum advance. Brand Mercedes Cylinders 4 Operating voltage 4-15V Wires Black: coil '-', Red: ignition key (battery 6V / 12V) Model Switch Rotation direction CW & CCW Vacuum Vacuum RPM range 500-8000 RPM IE (D-jetronic support) yes Environmental temperature -30 – 100 °C Cap type Straight Dwell Constant current: fully automatic adaptive dwell Coil charging time-out After 1 second, coil current is turned off Spark balancing <0.5 degrees Maximum advance 40 degrees crankshaft the 123\MERCEDES-4-R-V is designed for the W110, W115 and W123 engines, in the Mercedes : – 190C– 200– 220– 220US– 230 Next to the standard-curves, it offers optimised advance-curves for driving on LPG or E85, the new Bio-Ethanol-fuel of the future. For cars with Bosch ‘D-jetronic’ injection-systems, order the 123\MERCEDES-4-R-V-IE. The unit offers a maximum total of 16 advance-curves to be selected by the end-user.Please take a look in the table below for available advance curves.