SL-Class (R129) 1990-2002: SL 280, SL 300, SL 320, SL 500, SL 600, SL 60 AMG

SL/R129: Code reader for 1998 sl600

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Old 07-13-2019, 12:05 PM
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Sl600 & 750li
Code reader for 1998 sl600

I’m looking for a code reader for my sl 600

anyone have any recommendations?
Old 07-14-2019, 08:27 PM
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'09 S600, (2) R129 300SLs, '03 SL500, '03 SL55
A Chinese clone of Mercedes' Star Diagnosis is the only solution to consider. Buy a kit based upon a Dell D630 laptop (sourced from eBay) from aliexpress.com or other verndor for about $300.
Old 07-15-2019, 03:22 PM
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Buy a Dell laptop? I just need a code reader. Anybody know if the Autel
ds808k will work on my sl?
Old 07-16-2019, 01:44 AM
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R129 SL55 AMG & W208 CLK55 AMG
A Bosch Actron hand held device is you want to read simple codes.
You can use it for other cars too so you're not stuck with one make.
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Old 07-16-2019, 09:29 AM
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'09 S600, (2) R129 300SLs, '03 SL500, '03 SL55
Originally Posted by Robear
Anybody know if the Autel
ds808k will work on my sl?
This hasn't got a cable to connect to Mercedes' proprietary 38-pin diagnostic port, so it can not possibly work.

Originally Posted by Ahmed
A Bosch Actron hand held device is you want to read simple codes.
That won't diagnose any of the following systems on an SL600: convertible roof, roll bar, ADS suspension, Drive Authorization System (security), central locking, climate control, Electronic Stability Program (traction), Brake Assist, alarm system, instrument cluster, air bag, Base Module (power supply).
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Old 07-16-2019, 06:17 PM
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Sl600 & 750li
Bosch said they don’t have anything that will work.
Old 07-17-2019, 02:27 AM
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Originally Posted by Robear
Bosch said they don’t have anything that will work.
I use mine to read out check engine EVAP leak faults and clear them.
But like other members have pointed out, it may not read other faults mentioned above.

https://www.amazon.com/gp/product/B011ICD2WQ/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1 https://www.amazon.com/gp/product/B011ICD2WQ/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1
Old 07-17-2019, 09:42 AM
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Actron

I don’t see the 38 pin Mercedes plug for that model
Old 07-18-2019, 03:18 AM
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Originally Posted by Robear
I don’t see the 38 pin Mercedes plug for that model
Buy it separately..
I got mine from
https://www.amazon.com/gp/product/B01I4HS1JC/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1 https://www.amazon.com/gp/product/B01I4HS1JC/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1
Old 07-18-2019, 08:39 AM
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'09 S600, (2) R129 300SLs, '03 SL500, '03 SL55
Originally Posted by Ahmed
Buy it separately..
I believe that cable is intended to communicate with the fuel injection controller on a '93-'95 car. Note that just four of the 38 pins are wired. For a '96 and newer car it would be redundant and entirely unnecessary.
Old 07-18-2019, 10:57 AM
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Redundant plug

It’s the only plug for the 98 model
Old 07-18-2019, 01:47 PM
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'09 S600, (2) R129 300SLs, '03 SL500, '03 SL55
Originally Posted by Robear
It’s the only plug for the 98 model
You should have an OBD-II diagnostic connector located in the under-dash panel beneath the steering wheel.
Old 07-18-2019, 02:19 PM
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Plug location

Plug is under the hood passenger side
Old 07-18-2019, 05:53 PM
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'09 S600, (2) R129 300SLs, '03 SL500, '03 SL55
Originally Posted by Robear
Plug is under the hood passenger side
That is the Mercedes proprietary 38-pin connector. You should have a 2nd connector.
Old 07-21-2019, 02:23 AM
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Nope, no 2nd connector on my 99. Sorry.
I used the 38 pin one under the hood and it worked fine.

Old 07-21-2019, 10:42 AM
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'09 S600, (2) R129 300SLs, '03 SL500, '03 SL55
Originally Posted by Ahmed
Nope, no 2nd connector on my 99.
U.S. federal law mandates that every vehicle sold since 1996 must have an OBD-II diagnostic port located in the passenger compartment. The EU enacted the same requirement a few years later.

Since you are in Bahrain, it is plausible to me that your car would not have the OBD-II port. And it is completely immaterial to the discussion on this thread, really, because as I suggested in an earlier post, you need/want a diagnostic tool which attaches to the 38-pin connector so that it can communicate with all vehicle systems.
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Old 07-23-2019, 02:51 AM
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Originally Posted by bobterry99
U.S. federal law mandates that every vehicle sold since 1996 must have an OBD-II diagnostic port located in the passenger compartment. The EU enacted the same requirement a few years later.

Since you are in Bahrain, it is plausible to me that your car would not have the OBD-II port. And it is completely immaterial to the discussion on this thread, really, because as I suggested in an earlier post, you need/want a diagnostic tool which attaches to the 38-pin connector so that it can communicate with all vehicle systems.
Hi

My R129 is a 1999 model US vehicle I imported into Bahrain.
I will once again check again to see if that 16 pin port you are referring to exists. No problem.

If not, then the issue the OP has could be relevant to my experience share here.
Accessing the OBD system through the 38 pin port under the hood, and reading out "some" faults.

Logical?

Last edited by Ahmed; 07-23-2019 at 02:58 AM.
Old 07-23-2019, 02:58 AM
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R129 SL55 AMG & W208 CLK55 AMG
Originally Posted by bobterry99
You should have an OBD-II diagnostic connector located in the under-dash panel beneath the steering wheel.
Originally Posted by bobterry99
U.S. federal law mandates that every vehicle sold since 1996 must have an OBD-II diagnostic port located in the passenger compartment. The EU enacted the same requirement a few years later.
I will check both sides!!!
Old 07-23-2019, 04:07 AM
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OP

Read through this , it's helpful

http://www.mercedesmedic.com/mercede...-need-to-know/
Old 07-23-2019, 12:33 PM
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Here are some pics of my OBDII plug on a MY2000 SL500 American model. The top and bottom pictures are flipped 180°. The gold coloured bolt head is on the left when looking forward. Hard to see, but using a mirror will help to find it. Hope this helps.
Peter.



Last edited by pjacobs55; 07-23-2019 at 12:39 PM. Reason: add comments
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Old 07-23-2019, 03:34 PM
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'09 S600, (2) R129 300SLs, '03 SL500, '03 SL55
Originally Posted by Ahmed
That is a very good link. But I find a contradiction.

The title of the page promises to reveal everything you need to know, but then states that "anything besides [clearing faults] requires that you have proper training".

That also happens to be the most asinine thing I have read on the web in some time. And since I participate in the comment section of websites which discuss U.S. politics, that is really saying something.

If you have a fault, then apart from clearing it the software practically holds your hand through diagnostic procedures which lead to a solution to the problem causing the fault.

An important part of using Star Diagnosis is the display of sensor and other data through the "Actual values" menu associated with all controllers. This doesn't require "proper training" -- it only requires common sense.
Old 07-25-2019, 06:11 AM
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Thank you sir, I will check when I get home!
Hope you are right and I am wrong because that will make life much easier for me.
Old 07-25-2019, 01:58 PM
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R129 SL55 AMG & W208 CLK55 AMG
PJacobs55 & BobTerry99

I owe you guys an apology and a special THANK YOU

Found the port. You guys are awesome

Here's the video


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