Saying hi with my 300e, but it needs help. - Mercedes-Benz Forum

LinkBack Thread Tools Display Modes
post #1 of 2 (permalink) Old 01-25-2011, 07:53 PM Thread Starter
BenzWorld Junior Member
Date registered: Jan 2011
Vehicle: 1990 300e
Location: Boston M.A
Posts: 7
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
(Thread Starter)
Saying hi with my 300e, but it needs help.

First off I would like to say hello to the MB forums. This is my family's car and am not familiar with MBs but I really want to get this thing running good again because its a pleasure to drive.

So we have a 1990 300e in the family with just over 100k on it and its been having this weird issue for about two years now. It started as a cold start issue only in cold weather (30* or lower), it would just crank and crank and eventually you could get it started, it probably took 10 min or so of cranking for a few seconds and repeating. As soon as the car was up to temp it would run without any issue. However this winter it has gotten to the point were the car has no power when its up to temp.

Now the car will immediately turn over and run for a second then stall, this process has to be repeated 6-8 times before it finally will idle. Even when she is up to temp if you give it enough gas to get out in traffic it wants to die and if poked hard enough will. Hell, it even has a hard time just idling.

This video was taken maybe two months ago when the car still ran O.K. when it was up to temp.

This is a video I took two weeks ago and you can see how it has gotten a lot worse. When the RPM's are around 500 thats the car in D and when their around 900RMP's thats P. You can see when Im on the throttle because the economy gauge gets pegged and the RPM's do nothing then stumble and rise.

I have replaced the OVP with no difference, and it runs even worse with it removed. Ive read the coolant temp sensor could be the issue and checked it by crossing the pins and it seems to be within the proper range when cold. Ive also read it could be the Idle Air Control Valve and will have to check that next time Im down at the parents place. Other than that I assumed it could be the cold start valve but now that its just running badly even when warm I think thats ruled out. Also It has not spit out one CEL. New cap, rotor, plugs, wires.

Any help would be most appreciated.

Last edited by mnopracing; 01-25-2011 at 08:13 PM.
mnopracing is offline  
Sponsored Links
post #2 of 2 (permalink) Old 01-25-2011, 08:34 PM
Outstanding Contributor
eric242340's Avatar
Date registered: May 2007
Vehicle: Zotye Auto 1.5T T600 2016
Location: The wild west of the Far East
Posts: 52,604
Mentioned: 3 Post(s)
Quoted: 312 Post(s)
Welcome to Benzworld


People sleep peaceably in their beds at night only because rough men stand ready to do violence on their behalf - George Orwell
eric242340 is offline  
Sponsored Links

  Mercedes-Benz Forum > General Mercedes-Benz Forums > General Mercedes-Benz

Quick Reply

Register Now

In order to be able to post messages on the Mercedes-Benz 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:
Please enter a password for your user account. Note that passwords are case-sensitive.


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

Email Address:


Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode

Similar Threads
Topic Author Forum Replies Last Post
1990 300e vs 1989 300e jfine W124 E,CE,D,TD Class 17 08-17-2015 06:02 AM
Hey parts gurus: Does the 300E and the 300E-24 Sportline use the same brake rotors? Angus 8002 W124 E,CE,D,TD Class 3 08-31-2010 02:47 PM
Need 2.6 300e or 190e motor for my 300e! In, around, nearish to Texas. decalservice For Sale/Wanted/Trade/Giveaway 0 05-14-2009 02:14 PM
1992 300E transmission in a 1993 300E 2.8 M104 engine? abiez W124 E,CE,D,TD Class 2 03-17-2009 10:17 AM
Will a 300E transmission fit in a 300E 2.6? spsinha W124 E,CE,D,TD Class 1 09-14-2004 10:10 PM

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


Title goes here

video goes here
description goes here. Read Full Story
For the best viewing experience please update your browser to Google Chrome