Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help



Go Back   PeachParts Mercedes-Benz Forum > Mercedes-Benz Tech Information and Support > Mercedes-Benz SL Discussion Forum

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 03-10-2008, 08:47 PM
Registered User
 
Join Date: Mar 2008
Posts: 1
Location of Cruise Control Module for 1991 300 SL

Can anyone advise the location of the cruise control module for a 1991 300 SL? Mine is not working and I need to remove it to have it remanufactured and then reinstall it. Any photos would be appreciated.


Last edited by lojkom; 03-10-2008 at 09:54 PM.
Reply With Quote
  #2  
Old 03-11-2008, 08:02 PM
Super Moderator
 
Join Date: Apr 2000
Location: Falls Church, VA
Posts: 5,316
WADR, do a little research yourself.

- Sign up for a free subscription to the EPC at https://epc.startekinfo.com/epc/home.jsp, and find the part

- Buy an alldatadiy subscription for your car

- Try a Search
__________________
Chuck Taylor
Falls Church VA
'66 200, '66 230SL, '96 SL500. Sold: '81 380SL, '86 300E, '72 250C, '95 C220, 3 '84 280SL's '90 420SEL, '72 280SE, '73 280C, '78 280SE, '70 280SL, '77 450SL, '85 380SL, '87 560SL, '85 380SL, '72 350SL, '96 S500 Coupe
Reply With Quote
  #3  
Old 03-11-2008, 09:02 PM
Registered User
 
Join Date: Mar 2003
Location: Milwaukee Wisconsin
Posts: 1,150
How do you sign up for the free subscription? I check the free box, but it
keeps asking for credit card.
__________________
Resistance is Futile.
Reply With Quote
  #4  
Old 03-11-2008, 09:36 PM
Super Moderator
 
Join Date: Apr 2000
Location: Falls Church, VA
Posts: 5,316
The CC # is for address verification.
__________________
Chuck Taylor
Falls Church VA
'66 200, '66 230SL, '96 SL500. Sold: '81 380SL, '86 300E, '72 250C, '95 C220, 3 '84 280SL's '90 420SEL, '72 280SE, '73 280C, '78 280SE, '70 280SL, '77 450SL, '85 380SL, '87 560SL, '85 380SL, '72 350SL, '96 S500 Coupe
Reply With Quote
  #5  
Old 03-11-2008, 11:00 PM
speace's Avatar
Member
 
Join Date: Jan 2003
Location: Atlanta, GA
Posts: 371
Quote:
Originally Posted by lojkom View Post
Can anyone advise the location of the cruise control module for a 1991 300 SL? Mine is not working and I need to remove it to have it remanufactured and then reinstall it. Any photos would be appreciated.
I happen to have borrowed the service manual on this from my mechanic as we troubleshoot my ASR problem. For a 91 R129 the cruise control is integrated into the Electronic Accelerator system. It looks to me like the only part that is unique to the cruise control is the switch on the steering column. Everything else is part of the Electronic Accelerator system.

If you are not having any problems with your accelerator function in a non-cruise situation, then the EA Throttle actuator is ok. There appears to be a small amount of electronics inside the Electronic Accelerator Control Unit that would be unique to cruise control function. The EA Control unit is inside a box under the hood on the firewall of the passenger side. There are multiple modules in that box and there is no detailed picture in this book that says which one is it...

I don't think the car will operate with the EA Control unit removed. At best, it will operate in "Limp Home" mode while you have it out to be rebuilt.

I suppose you can just follow the cable from the Electronic Accelerator Actuator back to the control module...

I wonder if there is another reason the cruise system is not working?
For example, the book says:

"The cruise control circuit continuously monitors the ground signal from the brake lamp bulbs. It should be noted this means if there is no ground signal through the brake lamps (e.g., bulbs are burned out or removed) the cruise control cannot function. Neither ASR nor electronic accelerator control are affected,"

From this I would deduce that if you have the wrong brake lamp bulbs, or have a bad ground connection to the brake lamps, the cruise control cannot function.

I hope this helps!

Good luck and keep us posted!
__________________
02 S500
92 500SL
92 400E (Sold)
87 300E (Sold)
83 300D Turbo (Sold)
75 300D (Sold)
74 240D (Sold after 20 years)
Reply With Quote
  #6  
Old 03-11-2008, 11:19 PM
Registered User
 
Join Date: May 2001
Location: Las Vegas, Atlanta
Posts: 670
Quote:
Originally Posted by lojkom View Post
Can anyone advise the location of the cruise control module for a 1991 300 SL?
In the area of the various control modules you should see one that has a silver bracket with black knob labeled "MAS". The cruise control module is located to the rear of this and is along the fender. It is black. If you need a picture, send me an email.

I believe the information that speace gave is correct and applicable to cars with ASR.
Reply With Quote
  #7  
Old 03-15-2008, 05:05 PM
Registered User
 
Join Date: Aug 2003
Location: CALIF
Posts: 80
300 Sl Info, Please.

Allo.

I have a '83 280 SL. 5 Sp. Love it !

Now, I'm looking for a 1990-1996-- MB SL 300.
Where is the forum/group ?

What are the common weakness/flaws or areas in these models ?

for example: elec problems/auto top failure/water in trunk ).

Please advise and/or point me to the correct forum/group.


Many tks.
__________________
THANK YOU. CONRAD
Reply With Quote
  #8  
Old 03-15-2008, 05:25 PM
speace's Avatar
Member
 
Join Date: Jan 2003
Location: Atlanta, GA
Posts: 371
Quote:
Originally Posted by CONRAD View Post
Allo.

I have a '83 280 SL. 5 Sp. Love it !

Now, I'm looking for a 1990-1996-- MB SL 300.
Where is the forum/group ?

What are the common weakness/flaws or areas in these models ?

for example: elec problems/auto top failure/water in trunk ).

Please advise and/or point me to the correct forum/group.


Many tks.
Conrad,

You are in the right forum, but you will have better luck getting responses if you re-post this question as a NEW post here in the SL forum.

The 93 and earlier 129 models had some problems with the wiring harnesses around the engine becoming brittle and crumbling. The harness attached to the Electronic Accelerator Actuator is particularly troublesome. The EA is expensive, but once replaced, the problem should not reappear.

In 1994 there were improvements in the electronics diagnostics for the engine, etc. So, if I were looking today, I would choose at least a 94 model. Note that in 94 the 300SL became an SL 320. I don't know if the 5 speed transmission was still available in 94. I know the older 300SL models were available with a 5 speed.

Other typical things to "expect" are leakage in the seals on the hydraulic cylinders that move the top and the seals on the hydraulic latches up above the windshield.

If you an find one that has been well cared for, you should really enjoy it!

__________________
02 S500
92 500SL
92 400E (Sold)
87 300E (Sold)
83 300D Turbo (Sold)
75 300D (Sold)
74 240D (Sold after 20 years)
Reply With Quote
Reply

Bookmarks

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 On
Trackbacks are On
Pingbacks are On
Refbacks are On




All times are GMT -4. The time now is 11:35 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2018 Pelican Parts, LLC - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page