w 140 a/c problem
 

hi.. i need some help guys, i have a 93 300se thats stop blowing air from the center vents the side rear and defrost works fine. i notice it after i change the vacum pump under the rear seat that operates the door locks, what do i check for first thanks for the help.

Vacum pump
 

I would check the connectors at the pump first, make sure they are sealed properly

w 140 a/c problem
 

ok. i didnt know that the vacum pump under the rear seat works with the front a/c thats new to me thank you sir.

It may or may not
 

Well it may or may not, however seeing that it was the last thing you did before the issue took effect then i would go back to it, The next best suggestion i could recommend might cost you $14.95 go to www.alldatadiy.com this is an online repair manual that i've been using for years on all of my mercedes it is very informative not just a repair manual but it also gives trouble shooting, symtoms and solutions check it out.