SL500 air vent problem

205

Asked by Jul 13, 2007 at 12:37 PM about the 1999 Mercedes-Benz SL-Class SL500

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

795

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.
390

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

31 out of 31 people think this is helpful.
390

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.
390

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.

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

Your Answer

Add photo

Related Questions

SL-Class

Looking for a Used SL-Class in your area?

CarGurus has 3,390 nationwide SL-Class listings starting at $1,500.

ZIP:

Search Mercedes-Benz SL-Class Questions

Mercedes-Benz SL-Class Experts

#1 bobkat
bobkat
Reputation 1,200
#2 Michael Kane
Michael Kane
Reputation 390
#2 twhobie
twhobie
Reputation 390
View All

Related Models For Sale

Used Mercedes-Benz S-Class
158 Great Deals out of 5,942 listings starting at $2,500
Used Mercedes-Benz E-Class
700 Great Deals out of 22,860 listings starting at $1,500
Used Porsche 911
138 Great Deals out of 4,432 listings starting at $10,950
Used Mercedes-Benz SLK-Class
75 Great Deals out of 1,422 listings starting at $2,695
Used Chevrolet Corvette
360 Great Deals out of 20,214 listings starting at $3,688
Used Mercedes-Benz CL-Class
22 Great Deals out of 617 listings starting at $4,786
Used Mercedes-Benz C-Class
928 Great Deals out of 32,453 listings starting at $2,497
Used Mercedes-Benz CLK-Class
61 Great Deals out of 1,465 listings starting at $2,990
Used BMW 7 Series
188 Great Deals out of 5,841 listings starting at $3,599
Used Jaguar XK-Series
51 Great Deals out of 822 listings starting at $3,700
Used BMW 3 Series
1,770 Great Deals out of 40,586 listings starting at $1,350
Used Ford Mustang
689 Great Deals out of 38,143 listings starting at $1,750

Used Cars For Sale

2017 Mercedes-Benz SL-Class For Sale
519 listings starting at $81,785
2016 Mercedes-Benz SL-Class For Sale
161 listings starting at $59,999
2015 Mercedes-Benz SL-Class For Sale
107 listings starting at $57,991
2014 Mercedes-Benz SL-Class For Sale
7 Great Deals out of 175 listings starting at $47,990
2013 Mercedes-Benz SL-Class For Sale
14 Great Deals out of 363 listings starting at $40,991