My 1987 560sl dose not blow any air out of the center dash vents. All
works ok as far as cooling and heating goes but air is discharged from
the right & left dash vents, the doors, under the dash, but not the
center vents. There is a full flow of air coming out of the defrost
vents onto the windshield & that fogs up the glass outside of the
car. I suspect that some door or flap is stuck in the defrost mode..
Has any one had this happen or dose any one know what to do for this
type of illness? I am going under dash diving next weekend and could
use some tips. Any help would be greatly appreciated.
9 times out of 10, on the 107 body, the center vent won't open because the short
stroke part of the
defroster element has failed. Don't do any 'under dash diving' next weekend....
there is nothing to
see! Remove the steering wheel, remove the cluster. Look in the top right
corner of the cluster
opening. You will see a vacuum element with 2 vacuum lines going to it. That is
the defrost element.
Disconnect the line going to the SIDE nipple. Cap the LINE going to the element.
Don't worry about
the nipple on the element.. Put the car back together. Start car. You should
have center vents now.
So, after removing the steering wheel and pulling apart the dashboard,
he's supposed to disable the defroster and put the car back together
that way? Why would anyone in their right mind do that instead of
replacing the failed part?
Bruce, what setting are you using? On MB's of your vintage, the center
vents were only used for "non-heated" air, which meant fresh or a/c, but not
heater air, which was only directed out the corner vents, lower and
Motorsforum.com is a website by car enthusiasts for car enthusiasts. It is not affiliated with any of the car or spare part manufacturers or car dealers discussed here.
All logos and trade names are the property of their respective owners.