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 > Diesel Discussion

LinkBack Thread Tools Display Modes
Old 06-26-2007, 09:41 AM
Registered User
Join Date: Jun 2007
Posts: 1
AC Problem

AC works fine most of time. Every now and then the tach needle drops back to 0 (usually after a automatic transmission shift under fairly hard acceleration), when this happens the AC quits blowing cold air. You can pull over and shut the engine off...wait a few minutes and restart and it usually begins working again. Any ideas? Sorry about that...1985 300 DT

Last edited by jimbob; 06-27-2007 at 01:24 PM.
Reply With Quote
Old 06-26-2007, 10:31 AM
karburn's Avatar
Registered User
Join Date: Jun 2007
Location: Overland Park, Kansas
Posts: 99

year and model? [I just sold a 78 240D]
Kevin Arburn
Overland Park, KS
1987 560SL
Reply With Quote
Old 06-26-2007, 10:36 AM
rrgrassi's Avatar
mmmmmm Diesel...
Join Date: Jun 2006
Location: Royse City Tx
Posts: 4,875
Need year and model. Some newer ones rely on the input from the tach. A zero RPM signal will shut down some a/c systems and the 0 RPM indicates engine shutdown.


70's SPM #5608 Fairmont A-4 MOW car

06 VW Jetta TDI 280K miles

03 VW Golf TDI 5 speed 400K Miles Engine died

RIP--Lost in fire...82 300D 322K was My Daily Driver-On the search for a w126 now...

90 Dodge D250 5.9 Cummins/5 speed. 400K
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 10:47 AM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2020, 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