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

SL/R129: 1998 sl500 sport performance chip

Old Sep 19, 2014 | 07:27 AM
  #1  
98sl500's Avatar
Thread Starter
Junior Member
 
Joined: Jun 2014
Posts: 21
Likes: 0
From: Audubon, Pa (near Philly)
2008 e350, 1998 sl500
1998 sl500 sport performance chip

Has anyone on this forum used the "PlugChip OBDII Plug-in Chip" from Engine Performance Chip (http://www.engineperformancechip.com...-chip-p-105)??

I'm always leery about the claims from these chip companies and would like to find someone who has actually used it and find out what, if any, the results were.

thanx

bob
Reply
Old Sep 19, 2014 | 10:50 AM
  #2  
cliffyk's Avatar
Member
 
Joined: Jul 2013
Posts: 126
Likes: 5
From: Saint Augustine, FL
1998 SL500


There is nothing that can be done through the OBD2 port on a '98 r129 that could possibly influence engine performance. The only active data terminal is pin 7, an ISO 9141-2 protocol K-line that provides only generic OBD2 PID (Parameter ID) data.

In fact the only pins even populated in the OBD2 connector are 4 and 5 (ground), 7 (K-line) and 16 (+12 V):



In viewing their website I find they claim to be able to perform this magic on '99 through '04 Mustangs--vehicles of which I have intimate knowledge regarding engine tuning and OBD2 interfacing, having designed tuning interfaces and software for same.

Complete BS...

Last edited by cliffyk; Sep 19, 2014 at 07:32 PM.
Reply
Old Sep 19, 2014 | 11:20 AM
  #3  
98sl500's Avatar
Thread Starter
Junior Member
 
Joined: Jun 2014
Posts: 21
Likes: 0
From: Audubon, Pa (near Philly)
2008 e350, 1998 sl500
Greatly appreciate the input. I'm somewhat knowledgeable on the OBDII connector and wasn't aware of anything being done thru it, but wasn't that sure. Just amazes me these companies make claims and doesn't seem to be anyone challenging them.

Thanx
Reply
Old Sep 19, 2014 | 11:28 AM
  #4  
cliffyk's Avatar
Member
 
Joined: Jul 2013
Posts: 126
Likes: 5
From: Saint Augustine, FL
1998 SL500
I did a dissection and analysis of a FuelMaxx Fuel Maximizer Control Module some years ago, but it was only $10 from eBay--here is what I found...
Reply
Old Sep 19, 2014 | 01:29 PM
  #5  
98sl500's Avatar
Thread Starter
Junior Member
 
Joined: Jun 2014
Posts: 21
Likes: 0
From: Audubon, Pa (near Philly)
2008 e350, 1998 sl500
Originally Posted by cliffyk
I did a dissection and analysis of a FuelMaxx Fuel Maximizer Control Module some years ago, but it was only $10 from eBay--here is what I found...

Good analysis. Unfortunately I'm sure people still buy that stuff and talk themselves into thinking it does some good.
Reply
Old Sep 19, 2014 | 07:26 PM
  #6  
cliffyk's Avatar
Member
 
Joined: Jul 2013
Posts: 126
Likes: 5
From: Saint Augustine, FL
1998 SL500
BTW--I lived in Cherry Hill in the mid-70s for a year or so, worked at a place named Haskell-Dawes Machinery at 2231 East Ontario Street...
Reply

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

Thread Tools
Search this Thread
Rate This Thread
Rate This Thread:
You have already rated this thread Rating: Thread Rating: 0 votes,  average.


All times are GMT -4. The time now is 12:45 AM.

story-0
New Electric Mercedes-AMG GT 4-Door Coupe Unveiled: 10 Things You Need to Know

Slideshow: Mercedes-AMG's new electric GT 4-Door Coupe trades combustion for software, synthetic noise, and more than 1,100 horsepower.

By Verdad Gallardo | 2026-05-20 20:08:15


VIEW MORE
story-1
6 Mercedes Models That Did NOT Age Well (But Are Somehow Still Cool)

Slideshow: Not every Mercedes design becomes timeless, some feel stuck in the era they came from.

By Verdad Gallardo | 2026-05-12 18:09:07


VIEW MORE
story-2
Manual Mercedes? 6 Times Sindelfingen Let Drivers Have All The Fun

Slideshow: Yes, Mercedes built manual cars, and some of them are far more interesting than you'd expect.

By Verdad Gallardo | 2026-05-02 12:36:58


VIEW MORE
story-3
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren

Slideshow: A one-of-one U.S.-spec Mercedes-Benz SLR McLaren Roadster became even rarer after a factory-backed transformation at McLaren's headquarters.

By Verdad Gallardo | 2026-04-29 11:19:28


VIEW MORE
story-4
8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine

Slideshow: Before curves took over, Mercedes mastered the art of the straight line, and some of those shapes still look right today.

By Verdad Gallardo | 2026-04-25 12:05:49


VIEW MORE
story-5
Flawlessly Restored Mercedes 190E Evo II Heads to Auction

Slideshow: The 190E Evolution II shows how a homologation necessity became a six-figure collector icon.

By Verdad Gallardo | 2026-04-22 17:53:47


VIEW MORE
story-6
Electric Mercedes C-Class Unveiled: 11 Things You Need to Know

Slideshow: Mercedes is turning one of its core nameplates electric, and the details show just how serious this shift is.

By Verdad Gallardo | 2026-04-21 13:58:06


VIEW MORE
story-7
Mercedes EQS Gets A Major Update: Everything You Need to Know

Slideshow: Faster charging, longer range, and a controversial steer-by-wire system define the latest evolution of Mercedes-Benz EQS.

By Verdad Gallardo | 2026-04-15 10:35:34


VIEW MORE
story-8
5 Underrated Mercedes-Benz Models That Don't Get the Love They Deserve

Slideshow: These overlooked Mercedes-Benz models never got the spotlight, but they quietly delivered more than most remember.

By Verdad Gallardo | 2026-04-13 19:35:45


VIEW MORE
story-9
Mercedes 300D Has Pushed Well Past 1 Million Miles and It Ain't Stopping

Slideshow: A well-used 1991 Mercedes-Benz 300D with more than one million miles is now looking for a new owner, and it still appears ready for more.

By Verdad Gallardo | 2026-04-10 10:05:15


VIEW MORE