Parts Catalog Accessories Catalog Tech Info Tech Forums
  Search our site:    
 Cart  | Project List | Order Status | Help    

Go Back   PeachParts Mercedes ShopForum > Technical Information and Support > Tech Help

LinkBack Thread Tools Display Modes
Old 05-11-2001, 01:50 PM
Registered User
Join Date: Oct 1999
Location: New York City Burbs
Posts: 177
It has been a couple of years since I topped off my R12 in my 84 190E.

Before I put my manifold/gauges on, which was the HIGH pressure nipple, and which was the LOW side. If I recall the low was up near the left (drivers) strut tower and the high side nipple was over near the oil dipstick / exhaust manifold (right side)


(I know to fill on the low side!)
Patrick Leber
'84 190E 2.3
'83 Porsche 944 (track car)
'84 Porsche 944 (parts car)
85.5 Porsche 944 (sled)
Reply With Quote
Old 05-11-2001, 05:22 PM
Join Date: Mar 1999
Location: Tucker, Ga USA
Posts: 12,153
An easy way to be sure is to run car & see whitch one gets hot! the hot one is the high side. Also the high side uses a *smaller* dia tubing than the low side.
MERCEDES Benz Master Guild Technician (6 TIMES)
ASE Master Technician
Mercedes Benz Star Technician (2 times)
44 years foreign automotive repair
27 Years M.B. Shop foreman (dealer)
MB technical information Specialist (15 years)
190E 2.3 16V ITS SCCA race car (sold)
1986 190E 2.3 16V 2.5 (sold)
Retired Moderator
Reply With Quote
Old 05-11-2001, 07:01 PM
Posts: n/a
Hi Lo

Brother of the Benz
In determining what line is what, remember that the low or suction line is the larger of the 2 and returns from the evaporator/dash to the compressor. When the A/C is operating this line will be cold. The discharge is the smaller of the 2 and goes from the compressor to the condenser. This 1 is HOT.
Your charging hoses must have valve openers.
If you are capabile of servicing your unit, and considerring the cost of R12; you may consider changing to R134A.
The change over is quite simple and very inexpensive, $29.95 at K-Mart. This includes 3 cans of R134A, 1 can of oil charge, a can adapter and charging hose with excellent instructions.
My W124030 does quite well with R134A.
Happy Trails Beep Beep from The Spiderman in Houston!!!
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 Off
Trackbacks are On
Pingbacks are On
Refbacks are On

Similar Threads
Thread Thread Starter Forum Replies Last Post
Reasonable Price for a 93 190E 2.6 w/ 90K miles Chiragp Mercedes Used Parts For Sale & Wanted 8 01-28-2005 09:45 PM
'91 190E 2.3 rough, low idle - fixed sbourg Tech Help 0 08-19-2001 01:17 AM
1991 190e 2.6, ac air cold on center vent, hot on side vents Machnumber2 Tech Help 6 05-18-2001 02:05 AM
Reasonable Price for a 93 190E 2.6 w/ 90K miles Chiragp Performance Paddock 3 04-22-2000 11:11 PM
AC low side pressures? petaling Tech Help 4 09-10-1999 05:28 PM

All times are GMT -4. The time now is 02:17 PM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2016, 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