300e A/c Troubles
 

I'VE GOT AN 1989 300E, EVEN THOUGH THE A/C BLOWS COLD, I CAN'T GET THE 'VENTS' TO BLOW LIKE THEIR SUPPOSED TOO! THE DASHBOARD "FACE" VENT'S BLOW STRONG,AS DO THE REST OF THE VENT'S. EXCEPT FOR THE CENTER DASH "FACE"VENT'S. I'VE CHECKED THE ACTUATOR SERVO,VACUUM SOURCE,VACUUM LINES{AT LEAST THE ONE'S I CAN GET TO!!} ETC... I DID FIND A BAD FILTER/CHECK VALVE? THAT'S MOUNTED ON TOP OF THE BRAKE BOOSTER{IT HAD ONE LINE IN AND 4 LINES OUT} IT HAD FULL SOURCE VACUUM "IN" AND LESS THAN 2 IN.MERC. OUT. ANY HELP WOULD BE GREATLY APPRECIATED
:p