W124

I got a 87' 300D about a year ago. It had been sitting for several years I didn't know what to expect as far as power was concerned. Changed all the filters, and used the mercedessource injector cleaning system. The car ran much better. But still very sluggish. I hooked up a gauge to check the boost pressure. Im using original mercedes diesel engine sevice manual. It says that under full load at about 3500 rpm's I should have between .85 -.95 bar of pressure. All my gauges read in psi. When I converted .85-.95 bar to psi I get 12.32 -13.77 psi. Is that correct? Do these turbo's put out that much pressure.
I'm only getting a max of 3.75 PSI which is normal for american car engines.
So can some one tell me if this is suposed to put out 12-13 PSi of boost?

I have a problem with my blower motor not working. The motor is new and has been tested outside of the car. When installed it did not work. I have about 11.3 volts at the motor connectors. How do I determine if it is the blower regulator or the heater controls that are at fault?