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Old 06-22-2009, 01:41 PM
Benzmeister's Avatar
W107 Person
Join Date: Aug 2003
Location: Chicopee, Ma
Posts: 138
Vacuum pump

Originally Posted by Benzmeister View Post
I also have a vacuum pump and tested the pods or rubber diaphrams and they all worked the way they should. I had a buyer looking at the car yesterday, he told me of a private Mercedes shop in a nearby town that works on these HVAC systems. The guy has a 76, 81 SLC's and a 95 SL500 He took my 79 for a hours ride and when he returned he said this is one of the best running SLC's he has driven. Now if I could only get the HVAC to work. I did fix the vacuum leak on the passenger side. The vacuum was leaking back to the tank I put one of the blue and black thing in line on the blue vacuum hose now the door lock, gas door lock trunk lock all work. I checked in the shop manual on the HVAC, the vacuum for the HVAC is supposed to come directly off the engine, a white vac tube from the main vacuum distribution point. Can find this vacuum tube/line on my car?

PS: The guy who test drove my car is thinking about buying it as is. He said aside from the HVAC the car is in great shape, better then his other two and for what I am asking for it, its a steal.
I also have a vacuum pump and I tested part of the system and no leaks, I have to get around to testing the full system, but I have a potential buyer for the car, (he owns 3 SLC's) and he is not too concerned about the HVAC.
Al Lueb
1999 C280 54K miles
1979 450 SLC 144K miles
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Old 06-23-2009, 07:55 AM
Registered User
Join Date: Sep 2004
Location: Dublin, Ireland
Posts: 385
Originally Posted by SilverSaloon View Post

well done - i hope you get them working again.

A1078240011 is the Merc part number for the wiper steel block. very cheap from a dealer.

EDIT - just rang my dealer and apparently the above part number may be NLA - so you (and me aswell) may have to make one up. i recon the easiest way to do this would be to buy a washer and then with careful use of an angle grinder, shape it into the correct size using the other side as a template.

also another good tip is to fit the steel block and the retaining nut loosly BEFORE re-attaching the bumper. the wiper will then slot in, but getting the nut on the bumper with it in situ is quite fiddily, on euro bumpers atleast.

Thanks for the advice, I found an old ring spanner that came with some self assembly thing that was the right thickness and width so will bodge it from that. Couldnt resist making a video of this over-engineered contraption before I re-assembled it !

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