2 questions: Cold air from ctr vents/Pegged out oil pressure guage

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1991 190E

He all! First I'd like to thank everyone for their help on removing the ignition assembly! What a pain but thanks to all of your help it was completed with no left over parts!! But now I have two more problems that I would like to put before you:

1) When the heat is on all of the vents blow warm aur with the exception of the center console vents. Does not matter what setting the heater is on only cold air blows through there. Any comments?

2) The oil pressure guage is pegged out at the top. It goes back to zero when the car is switched off so I know it at least moves! I checked all of the engine fluids and all are good. Car runs fine, temp. is good but would like to know if there is something I need to check out.

Thanks for the help in advance and look forward to hearing from you!!