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

LinkBack Thread Tools Display Modes
Old 06-18-2001, 01:47 PM
Posts: n/a
Hey Everyone, I need some help

I have an 89 300E and the A/C blows nothing but warm air. I honestly had to pull over half way through my commute (3.5 hours) because I thought I was going to pass out at the wheel. The only problem I have, is that the car has 207k on it, and im not planning on keeping it longer than next spring. Im not about to drop 700 to take it to the dealer and get it fixed. It still has the original AC in it (R12 I believe it is) and I just want to give it a shot of R12. Which brings me to my next problem, where do I get R12 (if your even allowed to buy it) and then how do I put it in. On ebay I see you can buy the little hoses to Recharge the stuff but I wouldnt know where the Freon goes. Can somebody please help me out. I kinda need to get it done by this weekend (I have my mom's car while she is out of town), and Im not looking to pass out at the wheel anytime soon. Thanks in Advance.

Reply With Quote
Old 06-18-2001, 02:13 PM
G-Benz's Avatar
Razorback Soccer Dad
Join Date: Apr 2001
Location: Dallas/Fort-Worth
Posts: 5,711
Air conditioning shops still have R-12 available for older systems, but it is getting more scarce and thus, more expensive whenever you are having an older system recharged.
Plus, it has to be reclaimed properly (another added cost).

You may have a leak in your system which could require parts and labor from a few hundred to a few thousand $$$. If the leak is bad enough (as mine was in the past), recharging the system will get you through to the end of the week, only to have hot air again by the following weekend.

If you are not planning on keeping the car, don't invest any $$$ in the A/C system, and get a plug-in fan. Sorry.

Maybe others have a more optimistic viewpoint?
2009 ML350 (106K) - Family vehicle
2001 CLK430 Cabriolet (80K) - Wife's car
2005 BMW 645CI (138K) - My daily driver
2016 Mustang (32K) - Daughter's car
Reply With Quote
Old 06-19-2001, 07:14 AM
Posts: n/a
Just because it's blowing warm air does not necessarily mean that it is low on freon. The climate control pushbutton unit can fail and allow the heater control valve to flow, which will make it blow HOT air, not warm, but HOT. This valve is near the battery, with heater hoses going in and out. A simple check would be to use a clamp on the hose to STOP the flow of coolant to see if this is the problem. If the clamp brings back cold air you really need a pushbutton unit, and if you replace it MAKE SURE YOU CHECK THE AUXILLIARY PUMP FOR CURRENT DRAW. If the auxilliary pump is drawing more than 1.3 amps, it will blow the new pushbutton unit.

This gives you something to check without spending money.

Good luck,
Reply With Quote
Old 06-19-2001, 09:42 AM
Posts: n/a
The reason I thought it must be the freon is because I have noticed it dying as time has gone on. I could tell at the end of last fall that it was about done. Who knows, ill look over and see if any of those could be it.

Thanks for the help,
Reply With Quote
Old 06-19-2001, 09:49 AM
Join Date: Mar 2000
Location: Gainesville FL
Posts: 6,844
I presume that when you dispose of this car that you will expect someone to exchange money for it. If it came to my shop I would tell the prospective purchaser to deduct $2000 for an inoperative A/C. It is a fair risk assessment as a lack of A/C can mean many things. If it is possible to get A/C for less than that consider it a short term investment with the dividend being your comfort.
Steve Brotherton
Continental Imports
Gainesville FL
Bosch Master, ASE Master, L1
33 years MB technician
Reply With Quote
Old 06-19-2001, 11:57 AM
Registered User
Join Date: Mar 2000
Location: Dallas, Texas
Posts: 218
My 123 started blowing warm air. It was the control panel. Put a new one in, and it was amazing. It was blowing the hottest air I had ever experienced. Thought I would DIE on the trip to pick up the control unit. I would check that first. Just my opinion...
R Talley
88 BMW E32 735i (make it go away)
95 Volvo 960 "Inga" (valve problems)
95 Nissan Maxima (the indestructible)
89 Ford Ranger XLT (ugliest truck in the South)
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

Similar Threads
Thread Thread Starter Forum Replies Last Post
o-rings/seals needed for a/c engatwork Diesel Discussion 1 06-17-2004 09:15 PM
1987 300e A/c Push Button Problem TAYO Tech Help 5 07-22-2003 04:04 PM
is A/C cold for a 1987 300E? WANT '71 280SEL Tech Help 6 06-24-2003 11:18 PM
86' 300E A/C decides to quit - please help JFAZ Tech Help 5 11-20-2002 12:54 AM
88 300E a/c and heat budman Tech Help 2 06-29-1999 09:56 PM

All times are GMT -4. The time now is 07:31 AM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2018, 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