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-   -   Need to disable heater in 300SDL (http://www.peachparts.com/shopforum/tech-help/299012-need-disable-heater-300sdl.html)

jjjankovsky 05-18-2011 12:34 PM

Need to disable heater in 300SDL
 
Greetings,

My old 300SDL running the heater at all times now, despite any wheel or button adjustment...it's driving me out of the car (I live in Southern Mexico). Is there a way to stop the heat without disconnecting the heater core? The AC hasn't worked for years and is not an issue.

Thanks.

mbdoc 05-18-2011 04:30 PM

Use a clamp to block off heater supply line.

jjjankovsky 05-18-2011 06:13 PM

is that the single rubber tube on the driver's side running thru the firewall?

TX76513 05-19-2011 08:35 AM

Mono Valve is stuck open

jjjankovsky 05-19-2011 09:06 AM

is it possible to unstick the monovalve?

compu_85 05-19-2011 09:19 AM

Just fix it... the rebuild kit is like $50 and is available on this site.

http://catalog.peachparts.com/ShopByVehicle.epc?q=&yearid=1987%40%401987&makeid=63%40%40MERCEDES+BENZ%40%40X&modelid=6213%3AED|100 00100%3AMBC|1512%40%40300SDL&keyword=mono&subcatid=P:242328@@Mono%20Valve%20Repair%20Kit&mode=PA

-J

TX76513 05-19-2011 09:25 AM

Take it apart and inspect it - mine takes a manual adjust with a rubber hammer once a year. There are four screws on top (becareful don't drop into the sound wall cavern). Its very tight tollerance for a valve. Sometimes a little steel wool gets everything moving again.


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