Parts Catalog Accessories Catalog Tech Info Tech Forums
  Search our site:    
 Cart  | Project List | Order Status | Help    

Go Back   PeachParts Mercedes ShopForum > Technical Information and Support > Tech Help

LinkBack Thread Tools Display Modes
Old 11-03-2002, 11:16 PM
Registered User
Join Date: Nov 2002
Location: Nebraska
Posts: 58
Question 1975 450 SL heater control

I have just gotten a 1975 450 SL. I guess I need some help in running the heater as I cannot understand what operates the heater control valve. The interior controls operate, except for the passenger side control the changes the heat from the floor to the side vents. What controls the heater control valve so it does not always let the heater run hot. There is a vacumn line to the control valve, however I cannot find where the line goes. As older American cars there was a cable to the control valve, there has to be something to operate this one and I just can't seem to grasp it. Anyone able to help me out here?
Thanks: confused:
Reply With Quote
Old 11-04-2002, 08:30 AM
Join Date: Mar 1999
Location: Tucker, Ga USA
Posts: 12,153
The 2 outer levers MUST come all of the way down to allow micro-switches to control VACUUM control valve to pull heater valve closed.
MERCEDES Benz Master Guild Technician (6 TIMES)
ASE Master Technician
Mercedes Benz Star Technician (2 times)
44 years foreign automotive repair
27 Years M.B. Shop foreman (dealer)
MB technical information Specialist (15 years)
190E 2.3 16V ITS SCCA race car (sold)
1986 190E 2.3 16V 2.5 (sold)
Retired Moderator
Reply With Quote


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

All times are GMT -4. The time now is 06:55 PM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2016, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2011 Pelican Parts - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page