SL500 air vent problem

205

Asked by Jul 13, 2007 at 12:37 PM about the 1999 Mercedes-Benz SL-Class SL 500

Question type: Maintenance & Repair

My 1999 SL500 has recently stopped blowing air out of the  foot vent and the center vents of the system. Air and Heat still come out of the defroster and side vents. (the settings for the center and foot vents are set properly) What could be the problem?
Thanks Scott

8 Answers

815

You may have seperate blower motors for different vents. You could also check your fuses to see if one has blown.

2 out of 2 people think this is helpful.
205

Yeah, checked all the fuses, the Climate control unit responds well including diagnostics, it even registers the vents opening and closing when I do it manually with a screwdriver. I'm inclined to think it may be the Vacuum Valve actuator. which is what I am afraid of.

205

This turned out to be a disconnected Vacuum hose behind the firewall. Once I located the loose connection (small thin white tube) and connected back to the engine hose. Vents began to work after I started the engine and ran for few minutes.

15 out of 15 people think this is helpful.
410

Scottc, I have the identical problem with my 99. Could you be a bit more specific as to the location of the thin white tube? Thanks

33 out of 33 people think this is helpful.
410

Thanks Scottc. Found it and fixed it!!!!!

8 out of 8 people think this is helpful.
205

Glad you found it, probably saved yourself $200....I'm re-doing my convertible top in the next couple of weeks (getting all the parts and tools together), can't see paying someone $2k to do a lousy job (got the top on Ebay, and an installation video) looks easy but tedious, lets see how it goes...

3 out of 3 people think this is helpful.
410

Knowing my local M-B shop, I think it saved me a lot more than $200. Let us know how the top installation goes. Have a great summer, thanks again.

20

I have the same problem, connected white hose, ran a few minutes then stopped, any ideas?

2 out of 2 people think this is helpful.

Your Answer

Add photo

Related Questions

SL-Class

Looking for a Used SL-Class in your area?

CarGurus has 2,840 nationwide SL-Class listings starting at $3,500.

ZIP:

Search Mercedes-Benz SL-Class Questions

Mercedes-Benz SL-Class Experts

#1 bobkat
bobkat
Reputation 1,240
#2 Michael Kane
Michael Kane
Reputation 410
#2 twhobie
twhobie
Reputation 410
View All

Related Models For Sale

Used Mercedes-Benz S-Class
168 Great Deals out of 6,470 listings starting at $2,700
Used Mercedes-Benz SLK-Class
30 Great Deals out of 1,245 listings starting at $3,795
Used Mercedes-Benz E-Class
408 Great Deals out of 19,898 listings starting at $699
Used Porsche 911
81 Great Deals out of 4,454 listings starting at $9,995
Used Chevrolet Corvette
121 Great Deals out of 20,599 listings starting at $3,000
Used Mercedes-Benz CL-Class
22 Great Deals out of 586 listings starting at $4,495
Used Mercedes-Benz C-Class
461 Great Deals out of 26,531 listings starting at $2,000
Used Mercedes-Benz CLK-Class
41 Great Deals out of 1,251 listings starting at $1,500
Used BMW 3 Series
980 Great Deals out of 31,676 listings starting at $1,000
Used Jaguar XK-Series
37 Great Deals out of 686 listings starting at $4,585
Used Ford Mustang
458 Great Deals out of 45,641 listings starting at $1,999

Used Cars For Sale

2017 Mercedes-Benz SL-Class For Sale
410 listings starting at $88,375
2016 Mercedes-Benz SL-Class For Sale
69 listings starting at $61,995
2015 Mercedes-Benz SL-Class For Sale
100 listings starting at $44,995
2014 Mercedes-Benz SL-Class For Sale
121 listings starting at $47,995
2013 Mercedes-Benz SL-Class For Sale
178 listings starting at $37,955

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.