W202- Manual vent control problem

[AdrianUK]

Hi

I have a 85 C200 sport and an odd problem, went I turn the vent selector dial (not air con or climate) the air direction is not changed, I have checked the selectors are inserted and still nothing. Is this going to be a mega expensive fix ? Any help or advice greatly appreciated !

Adrian

 

[television]

Surly the rotary knob just sends the air up to the screen or down to the feet,,is this not happening

 

[AdrianUK]

Small correction its of course a 95 not 85 ! As for your question television, nope turning the knob has no effect the air is not directed anywhere, with the fan on full none of the vents get a blast out of them, I checked all the fuses in case its electric but they seem ok and I am dreading the cost if the whole dash has to be removed ! Again, any advice on the vent controls is welcome

 

[C220GJS]

Has the heater control unit been disturbed for any reason,if so the link rods may not have been fitted in correctly when it was reinstalled , at the back of the direction and fan control knobs there are sockets into which the control rods have to be fitted as the control unit is being installed.
It is fiddly but if not done correctly the dials will have no effect on the direction of air flow and/or temperature.

 

[television]

As C220GJS says it could be the rods come off or cable 44 and 47 in the link.

http://www.detali.ru/cat/oem_mb2.as...417717.418&CT=F&cat=45H&SID=83&SGR=045&SGN=01


The whole heater box etc is in this link

http://www.detali.ru/cat/oem_mb1.as...722.602&GM=717.417717.418&CT=F&Cat=45H&SID=83

 

[AdrianUK]

C220CGS
The rods have been disturbed (I lifted the panel to see how hard it would be to change the bulb behind the vent dial) so thats one to check,

Television
Is it possible to check if the cables are connected by removing a panel ?

Both
Thanks for the advice !

 

[television]

C220CGS
The rods have been disturbed (I lifted the panel to see how hard it would be to change the bulb behind the vent dial) so thats one to check,

Television
Is it possible to check if the cables are connected by removing a panel ?

Both
Thanks for the advice !

I believe that it is all rod operated, and I should not have said cables. It can only be the rod to the direction flap off or in the wrong place

 

[AdrianUK]

Television

Final Q I hope, can I get to this rod for the direction flap ? I am a total newb to car mechanics so be gentle !

Thanks

 

[television]

Television

Final Q I hope, can I get to this rod for the direction flap ? I am a total newb to car mechanics so be gentle !

Thanks

We all all kind here what I am thinking now is that if you connected the rod when the flap was in the wrong position then that could be the trouble

 

[AdrianUK]

Final Thoughts

I reseated the switch correctly this time and its switching vents ok now, demister is a litte feeble but airs defintely being directed there. Now all I need to is figure how to change the bulb in the selector !

Thanks Again !

 

[bigasotonuk]

Hi,
To change heater display lamps, look at this link it is for a W210 E Class but W202 C class very similar.
http://forums.mercedesclub.org.uk/showthread.php?t=26198
Another link which may assist you as it deals with same part of the dash but on a W202 like yours.
http://forums.mercedesclub.org.uk/showthread.php?t=31984

 

[bigasotonuk]

Just as an after thought the reason for the weak air flow is more than likely your pollen filter, as it does seem to get forgotten about if the car has been serviced outside of MB dealer. Very easy and quick fix £20 or less for the filter and about 15 minutes of your time.
How to do it in this link,
http://202tech.mkosonen.com/howto/blower.html
Hope this has been of some help.

 

[C220GJS]

If it's just the illumination for the knob that's failed the bulb is in the centre of the knob spindle. To access it pull the selector knob off using a pair of padded pliers and if you have a problem removing the bulb use a drinking straw or similar with a spot of superglue.

 

[AdrianUK]

Guys (Girls?)

What can I say, your life savers, thanks for everyone !

Adrian