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 ShopForum > Technical Information and Support > Tech Help

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 11-30-2000, 01:54 PM
David Pare'
Guest
 
Posts: n/a
I just took a 360 mile trip (each way) in my 1986 way up north of NYC near Canada for Thanksgiving. (1) It was cold, my gauge read a solid 70 all the way and cold air came from the vents except at a stop or slower speeds. (2) The car was not quick going up hills, the tach was only reading 21,000 rpms and would not go faster than 40-50mph! and (3)The scariest thing was the cruise control seamed to get stuck in accel and would not disengage by braking or decel on the wand, I had a small panic attack, put it in neutral, the tach flipped and in finally disengaged (whew). Any similar experiences? solutions?

Thanks
Reply With Quote
  #2  
Old 11-30-2000, 10:20 PM
Registered User
 
Join Date: Jul 2000
Location: Toronto, CANADA
Posts: 1,193
I have had a similar problem once. My cruise stuck and I had to throw it into neutral and pull it off the road. I waited a few minutes and started it again. It immediately redlined so I shut it down again. I couldn't imagine what was wrong. Eventualy I reached down ad grabbed the gas pedal. It had stuck to the floor. It came up no problem and after that everything was fine. My mechanic said it was the linkage and he lubed it or something. Hasn't happened again. (This happened while accelerating (resume) on cruise). Haven't experienced the other problems.

Can't comment on the cold running or cold air problems.

JP Toronto

PS I think you meant 2500rpm not 25,000rpm
__________________
Jason Priest
1999 E430
1995 E420 - retired
1986 420SEL - retired
Reply With Quote
  #3  
Old 12-01-2000, 12:26 PM
David Pare'
Guest
 
Posts: n/a
Jason,

Thanks, I'll lube it! I am looking into the thermostat being the culprit for the temp problem. As far as the acceleration up hill, I'm still lost.
Reply With Quote
  #4  
Old 12-01-2000, 01:55 PM
Registered User
 
Join Date: Jul 2000
Location: Toronto, CANADA
Posts: 1,193
How steep a hill was it? If the tach was only showing 2500 at 45-50 mph then I assume you were in 4th gear. To accelerate a car as heavy as a 420SEL going up a steep hill you'd have to get into the higher RPMs. Get a second opinion on this as I am no expert, but it sounds like it just didn't downshift for you. Try it again and step on the gas hard and fast. Either that or manually downshift into third.

JP
__________________
Jason Priest
1999 E430
1995 E420 - retired
1986 420SEL - retired
Reply With Quote
  #5  
Old 12-01-2000, 02:16 PM
Hunter
Guest
 
Posts: n/a
Dave, check two things, first, attached to the throttle linkage is a downshift cable that somehow actuates the transmission in relation to throttle pressure (your foot). This may need to be adjusted, easily done by loosening a threaded nut on the end of the linkage. Secondly, the downshift button located beneath the gas pedal may be bad and in need of replacing, its electrical I believe. I had a similar problem on my 89 420 and it was easily corrected. Good luck...
Reply With Quote
  #6  
Old 12-01-2000, 02:46 PM
David Pare'
Guest
 
Posts: n/a
Thanks Hunter! I'll check both of those possibles this weekend, sounds likely it's one or the other. Do you remember the cost of the switch?
Reply With Quote
  #7  
Old 12-02-2000, 08:47 AM
lobito
Guest
 
Posts: n/a
If you still have the problem, consider a plugged catalytic converter.
Reply With Quote
  #8  
Old 12-02-2000, 05:06 PM
Ashman's Avatar
Registered User
 
Join Date: Sep 2000
Location: Sherman Oaks, CA
Posts: 4,748
Yes a plugged cat can be a cause of slowness.

My bro's 85 190e had a clogged cat, in neutral it would rev fine, in gear you put your foot down and car would go maybe 10-20 mph.

After that was fixed, car ran fine.

Alon
__________________
'92 300CE - Sold
2004 C240 - C7 Wheels - Android Radio
2015 ML350 - P1, Pano, Ash poplar wood, Sport Dinamica interior, Running Boards Keyless go.
Reply With Quote
  #9  
Old 12-03-2000, 10:04 AM
Registered User
 
Join Date: May 2000
Location: Montreal
Posts: 25
Your lack of heat is 95% caused by the monovalve diaphragm being broken, you buy it as a kit and it's very easy to replace but messy. PN for my 420sel 88 is 000 835 06 44. Symptoms on my car were the same as yours.
__________________
Mihai

1988 420sel
1973 porsche 914 2.0 (Deceased)
Reply With Quote
Reply

Bookmarks

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


Similar Threads
Thread Thread Starter Forum Replies Last Post
Post your MPG for your gasoline MB Triffin Featured Cars 92 03-05-2004 06:55 PM
1991 420SEL decision time... BENZ-LGB Off-Topic Discussion 13 12-15-2003 12:47 AM
Sudden change in trip computer mileage after power loss dac77 ML, GL, G-Wagen, R-Class, Unimog, Sprinter 5 07-28-2003 05:48 PM
First long high temp road trip Stevo Diesel Discussion 9 09-25-2002 01:44 PM
190E vs. 420SEL TimBru99 Tech Help 5 10-13-1999 10:09 AM



All times are GMT -4. The time now is 11:35 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2011 Pelican Parts - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page