Mercedes Benz Forums


Go Back   Mercedes Forum - Mercedes Benz Enthusiast Forums > Mercedes Benz Models > Diesel Discussions
Sign in using an external account
Register Forgot Password?
Search

Welcome to Mercedes Forum!
Welcome to Mercedes Forum.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, at no cost, you will have access to start new topics, reply to conversations, privately message other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, join Mercedes Forum today!

Reply
 
 
 
 
LinkBack Thread Tools Search this Thread
  #1  
Old 08-20-2007, 12:10 PM
CJM CJM is offline
 
Join Date: Aug 2007
Location:
Posts: 3
Default '84 300SD problems Need Help!

We purchased this 84 300sd turbo diesel a few months ago, our first MB, and love it, but then things started going wrong with it...
1. Wipers stopped... probably wiper motor, but rainex works great for now.
2. Driver and rear passenger windows won't go down.
3. Heater won't turn off, it's blowing HOT air (unbearable since driver window won't go down!)
4. Accelerator is sticking. At first it wouldn't accelerate, and today it stuck while accelerating!

Any advice would be much appreciated!
Register today for free or log in if already registered to remove this ad!
__________________
C&C
1984 MB 300 SD Turbo
211,000+ miles
Reply With Quote
  #2  
Old 08-20-2007, 01:11 PM
Senior Member
 
Join Date: Mar 2006
Location:
Posts: 157
Default RE: '84 300SD problems Need Help!

Window issue is either a cracked fuse or corroded fuse. Remove fuse box cover determine from the printed guide which fuse. Regardless of how it looks, replace it! One fuse provides power to l/front and r/rear, another for r/front and l/rear. Wipers probably fuse as well. Throttle can get stuck under improper floor mats or the rods need removed going from the firewall to the throttle and the ball sockets lubed. Just pop off each rod end one at a time and use something like wheel bearing grease on the ball. No need to completely remove the rod, just one end at a time. Less chance of adjustment being messed up!
__________________
1981 300CD. had a 72 280SEL 4.5, had a 66 250S
Reply With Quote
  #3  
Old 09-04-2007, 06:11 PM
 
Join Date: Aug 2007
Location:
Posts: 67
Default RE: '84 300SD problems Need Help!

1. If the driver and rear window stopped working at the same time, then I tend to agree, it might be the fuses.
2. If the pedal is getting stuck, then lube up the ball sockets. If you're not handy, get someone to lube them who knows Mercedes cars (especially diesel; there is nothing worse than a mechanic working on a diesel who doesn't know diesels).

Everything carnut said is correct. I had an 84 300SD, they are VERY RELIABLE cars.

Also, how many miles on the car, have you done a valve adjustment ever?

Let us know how it goes!
Tom
__________________
DieselCrazy
Currently Owned:
1999 S420, 47,000 miles, All Stock, Black on Black
1987 300SDL, 90,000 miles, Black, with Grey Leather All Stock
Previously Owned:
1984 300SD, 94,000 miles, Very Close to Mint Condition
Reply With Quote
  #4  
Old 09-09-2007, 07:01 PM
CJM CJM is offline
 
Join Date: Aug 2007
Location:
Posts: 3
Default RE: '84 300SD problems Need Help!

Thanks for the advice!

The window issue was a fuse. Auto maintenance 101: Check fuses!!!

Still having trouble with the accelerator but haven't really tried to fix it yet.

Our MB has over 211000 miles on it and hope to get many more!
__________________
C&C
1984 MB 300 SD Turbo
211,000+ miles
Reply With Quote
  #5  
Old 09-12-2007, 10:19 PM
 
Join Date: Sep 2007
Posts: 33
Default RE: '84 300SD problems Need Help!

For the heater problem consider the monovalve. A failed diaphragm will prevent it from stopping hot water flow. Also and just as likely is the temperature thumb wheel on the A/C controller. If this fails it signals the valve to send hot water into the cabin and you have heat. It is intresting that with a failed wheel, both the a/c and the heater can be running at the same time.
Reply With Quote
  #6  
Old 09-14-2007, 07:59 AM
CJM CJM is offline
 
Join Date: Aug 2007
Location:
Posts: 3
Default RE: '84 300SD problems Need Help!

You guys are great! I love reading all the great advice in this forum. Husband, Carl, did an oil and filter change last night, also fixed the accelerator issue. Runs great now!

The rod for the accelerator lost the clip that attaches it to a plate. (sorry, don't know the technical terms yet!) For now we are using a paper clip to hold it in until we can order the correct part.

He was amazed at how easy this engine is to work on. Luckily any repairs we've had to do have been minor (knock on wood). Hope it stays that way!

Cathy
'84 300SD 211,000 + miles
__________________
C&C
1984 MB 300 SD Turbo
211,000+ miles
Reply With Quote
Old 09-14-2007, 07:59 AM
 
 
 
Reply

Tags
300sd, 84, ac, fuse, heater, mb, mercedes, open, passengers, remove, roll, stays, time, troubleshooting, window


Thread Tools Search this Thread
Search this Thread:

Advanced Search

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 Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Advertising
Featured Sponsors
Vendor Directory
Our Sponsors
GetCoolParts.com
Monroe, WA 98272
360.863.0557
All times are GMT -5. The time now is 12:50 PM.

Internet Brands, Inc.



SEO by vBSEO ©2010, Crawlability, Inc.