Does anyone happen to have the engine compartment vacuum line routing/color coding diagram for a 2/91 350SDL? This particular car, VIN WDBCB35D6MA601870, doesn't have a vacuum amplifier, that blue 3" dia saucer-shaped device usually located behind the ABS control unit on the left fender-well (unless it's located somewhere else; under the dash?). All the diagrams I've seen are for the earlier models with the vac amplifier. Thank you.