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 10-14-2008, 05:42 PM
Registered User
Join Date: Oct 2008
Posts: 1
Angry 91 300 e wont start and then later it does. Please help!!!

I have a 91 300 e 2.6. For the last year and a half, about maybe 4 or 5 times a year, when I am stopped t a light or even slowing to a stop, the car would stall. I would immediately turn the key and it would restart and no problems. Now lately, he would start fine the first cold start and then after driving for a while maybe 10 minutes, i would shut her down go into the store and then nothing. she wont start. this happpend about a week ago. i got picked up and left the car there and returned about 4 hours later with a friend to tow me back home. I decided let me try her. Sure enopugh she started and i drove home. today i went literally 1 mile to the store about 4 minutes and then shut it got out went to start again and it wouldnt start. it turned like it would but wouldnt. i also was getting what seemed like a backfiring from the carb. i waited a little bit and triued again with the same rsults. i kept trying becasue each time as i was about to turn the key back to the off position, it sounded like it would start. as i was turning the key i tried pumping the gas. after a few times doing this it finally started but ran rough like it wasnt getting enough gas. after like 7 or 8 seconds it ran smooth. i drove back home and shut her off and hse started right up again.. i then gave it a little gas and it had a hesistaion but then the rpms went up and it ran fine. I NEED HELP!. I have read the forums and see it could be the crankshaft position sensor, the cold start relay, the ovp , the mas relay or faulty fuel pumps. I am not mechanically inclined in the least. Where do I start? I did look behind the battery and removed the cover and did see two large silver square boxlike things. one said mas on it and had a knob on the top. I have no clue what these are or what they do or if the mas relay has relays inside as some posts said. ANy help would be great. You can also email me at Thanks

Reply With Quote
Old 10-14-2008, 08:55 PM
Registered User
Join Date: Oct 2008
Posts: 557
Here's my opinion

based upon description I would put new spark plugs in (the new Bosch copper +) and a new coolant temp sensor. Should be less than $60 all told, that fixed my 1990 300TE like a champ...seriously...that's where I would start...good luck
Reply With Quote
Old 10-14-2008, 10:14 PM
J.HIDALGO's Avatar
Registered User
Join Date: Jul 1999
Location: Jax, FL
Posts: 1,785
Do a search on fuel pump relay and the OVP, as you already mentioned.

Both of these items are behind yourf battery. I am not sure if your year has them. Someone else can confirm...Also, when was the last time you change your fuel filter...?
'86 300E
Reply With Quote
Old 10-15-2008, 12:10 AM
Registered User
Join Date: Dec 2000
Location: AL
Posts: 1,219
Check the coil.

2012 E350
2006 Callaway SC560
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 09:55 AM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2022, 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