Clean or replace R170 blower control selector? - Mercedes Benz SLK Forum

 
LinkBack Thread Tools
#1 Old 09-04-2010
Registered Users
 
Join Date: Nov 2008
Location: PA
Vehicle: 2017 Yellow 718 Boxster
Other Toys: 2018 Tesla Model 3, 2018 Toyota Tacoma
Posts: 256
Country:
Chats: 0
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 5 Post(s)
Thanks: 29
Thanked 12 Times in 12 Posts
(Thread Starter)
Clean or replace R170 blower control selector?

I usually drive around with my climate control in the "AC Off" mode by pressing the "AC Off" button, causing the red LED on the button to light up.

On this 03 230 I recently acquired, I've noticed that more often than not, when I move the blower selector to the "0" position, the red LED will tend to flicker on and off for a bit...sometimes eventually staying off & sometimes eventually staying on

I've also noticed that when the LED remains on that there is still air flowing out of the vents, and that if I jiggle the blower control switch a bit, the LED will go out & the airflow out of the vents stops.

So my guess is that the blower control switch either needs to be cleaned or replaced. Has anyone done either & can offer some ideas/tips?
atebit is offline  
Sponsored Links
Advertisement
 
#2 Old 09-06-2010
Registered Users
 
Join Date: Nov 2008
Location: PA
Vehicle: 2017 Yellow 718 Boxster
Other Toys: 2018 Tesla Model 3, 2018 Toyota Tacoma
Posts: 256
Country:
Chats: 0
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 5 Post(s)
Thanks: 29
Thanked 12 Times in 12 Posts
(Thread Starter)
So here is the item in question (the "N19 Module, #10 on the diagram, A 170 830 11 85).

All the controls are integrated into the unit, but it appears that the knobs are removable..any idea if there's a place behind the knob where I could squirt in some contact cleaner to see if that does the trick?

Otherwise I think it's a 500USD+ part from MB.
Attached Images
File Type: jpg A 170 830 11 85.jpg (46.3 KB, 31 views)
atebit is offline  
#3 Old 09-06-2010
Registered Users
 
Join Date: Nov 2008
Location: PA
Vehicle: 2017 Yellow 718 Boxster
Other Toys: 2018 Tesla Model 3, 2018 Toyota Tacoma
Posts: 256
Country:
Chats: 0
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 5 Post(s)
Thanks: 29
Thanked 12 Times in 12 Posts
(Thread Starter)
I managed to get the knob off of the control, but it was on there pretty well. I had the best luck by using a thin plastic panel tool and a small screwdriver on the "thickest" part of the knob (where you grasp it to turn it), one tool at the top & one tool at the bottom. Trying to pry around the outside edge gave me the distinct "this is going to snap" feeling.

Also, when replacing the knob it looks like you'll need to be very careful that the tabs on the end of the knob's shaft are as close together as possible so that they both engage in the small hole in the switch. I think it would be very easy to misalign the tabs & straddle the hole (leading to that "snap" feeling again.

Anyway, after getting it off, it looks like there is a small hole in the upper right hand corner where I could spary some contact cleaner. Or I could try
spraying a bit down the center & around the edges of the hole where the knob goes. No idea if this switch is totally sealed or not.

While contact cleaner ought to be relatively harmless (as long as I manage not to overspray it onto the plastic trim), I'm a little reticent to just go spaying it aimlessly about. Based on what I saw on buellwinkle/r170 site, this N19 unit appears to have a fair amount of intelligence (based on all the other inputs it gets), so I don't want to go messing it up, either.
Attached Images
File Type: jpg IMG_0572.jpg (49.3 KB, 10 views)
File Type: jpg IMG_0571.jpg (62.7 KB, 10 views)
atebit is offline  
 
#4 Old 09-06-2010
JFR
Registered Users
 
JFR's Avatar
 
Join Date: Sep 2008
Location: rhône Alpes
Vehicle: SLK 320 BVA red amber 2002 + SLK 55 AMG red thulite 2007
Posts: 278
Country:
Chats: 0
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 4 Post(s)
Thanks: 132
Thanked 91 Times in 59 Posts
Garage
Hi

I won't do any spraying in that place . . .

these knobs work with air pipes behind the panel,
you should have a look behind the panel and check these pipes
JFR is offline  
#5 Old 09-06-2010
Registered Users
 
Join Date: Nov 2008
Location: PA
Vehicle: 2017 Yellow 718 Boxster
Other Toys: 2018 Tesla Model 3, 2018 Toyota Tacoma
Posts: 256
Country:
Chats: 0
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 5 Post(s)
Thanks: 29
Thanked 12 Times in 12 Posts
(Thread Starter)
I think you're right about the knob that controls which vents the air comes out of. But I'm pretty sure the blower speed adjustment is an electrical switch...that's the one I'm concerned with. It certainly feels like it's stepping through contacts as I turn it.
atebit is offline  
#6 Old 09-06-2010
Thread Hijacker
 
dmjonez's Avatar
 
Join Date: Aug 2008
Location: Kennesaw, GA
Vehicle: formerly 2001 SLK320, and 2006 55AMG. Shopping again.
Other Toys: MB E550 4matic, MB C300, Saab 9-3, PT Cruiser, Ram 1500, 737-700/800
Posts: 2,798
Country:
Chats: 1599
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 652
Thanked 782 Times in 401 Posts
Send a message via Yahoo to dmjonez Send a message via Skype™ to dmjonez
I had trouble with mine, and it wasn't really the switch, it was the regulator located in the footwell. Let me see if I can dig up an old link...

Okay, found them:

Link one
Link two
dmjonez is offline  
#7 Old 09-07-2010
Registered Users
 
Join Date: Nov 2008
Location: PA
Vehicle: 2017 Yellow 718 Boxster
Other Toys: 2018 Tesla Model 3, 2018 Toyota Tacoma
Posts: 256
Country:
Chats: 0
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 5 Post(s)
Thanks: 29
Thanked 12 Times in 12 Posts
(Thread Starter)
Thanks! But, after reading these I'm not sure that we're having the same problem. In my case, I can alternately cause/resolve the issue by jiggling the blower control knob a bit while it's in position 0.

I just re-attached the knob to the module (without spraying any contact cleaner)...let's see if it still acts up.
atebit is offline  
Sponsored Links
Advertisement
 
Reply

  Lower Navigation
Go Back   Mercedes Benz SLK Forum > Mercedes Benz R170 SLK Class Cars > SLK R170 class DIY

Bookmarks

Quick Reply
Message:
Options
Upload your files to MEGAUPLOAD
Upload your images to ImageShack

Register Now



In order to be able to post messages on the Mercedes Benz SLK Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in











Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
User Tag List

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Similar Threads
Thread Thread Starter Forum Replies Last Post
R170 Rear Control Arm Kit DesignoSLK Where to get R170 SLK Items 8 08-15-2018 02:13 PM
R170 control (option) codes Tslick SLK R170 General Discussion 16 03-24-2015 09:49 AM

Posting Rules  
You may post new threads
You may 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

 
For the best viewing experience please update your browser to Google Chrome
 

Clubs, Garage Plus vBulletin Plugins by Drive Thru Online, Inc.