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 > Tech Help

LinkBack Thread Tools Display Modes
Old 07-22-2004, 12:18 PM
Registered User
Join Date: Jul 2004
Location: Bourne, Mass
Posts: 13
1985 380SL NOx Emissions

The SL failed it's emissions inspection twice. The numbers are as follows:

Emissions /Max

NOX/3.00 ..........HC/2.00 ..........CO/30.00 ....... CO2/none
3.60/3.95 ........1.16/1.01 ........ 6.47/7.16 .........379/351

It passed the HC,CO, with flying colors but not the NOx. The improvement between the 2 tests was bringing it to my mechanic and he retarded the ignition timing.

Doing some usual work on the car myself I decided with the information available on the forum to try and tackle it and started reading the archives. There I found all the great information on EGR valves and how to clean and check and set to improve NOx.

Unfortunately I can find no EGR valve on this car I have the MB SL CD and find reference to it but nothing inder the hood as far as lines or valves on the exhaust manifolds. All other emissions equip seems to be in place and working the air pump etc. Is this engine before EGR and if it is what can be done to lower NOx? I had read here that 5 degrees retarded will work with the EGR valve operative has anyone had experience in this situation with no valve?

I would appreciate any help as I am between the proverbial rock and hard place.

1985 380SL 110k,mi
2000 Harley Dyna Conv 29k,mi
2004 Honda Element 48k,mi
1999 Honda Accord EX 156k,mi
1984 380SL 90k,mi (gone)
Reply With Quote


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 03:56 PM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2018, 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