Re: [diesel_mercedes] Help with HVAC

 

Michael,

I don't know any specifics on your car.  But....

Many recent cars turn on both heat and A/C for defrost, so you will get warm, dry air.  To check for A/C, let sit until motor and radiator are cool.  Crank up and quickly check defrost temp.  It should be cold for a minute or two.

Good luck,
Bobby



On Sat, May 10, 2014 at 7:42 PM, 'Michael E. Williams' attymw@yahoo.com [diesel_mercedes] <diesel_mercedes@yahoogroups.com> wrote:


I know I'm not in the diesel club anymore with my 280SE.  But I was wondering if you might be able to help me.

The servo does not work.  Only the defrost works.

So I jumped the A/C clutch to engage it by running a wire to positive terminal on the battery. 

My question is should he air be cold coming out of the defrost or not with the compressor on?

Thanks if you can help that would be so appreciated no one seems to know.

 Mike





--
Toward freedom,

Bobby Yates Emory

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Re: [diesel_mercedes] The Diesel Sports Coupe

 

Nate, SWMBO will win every time!

Joe

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[diesel_mercedes] The Diesel Sports Coupe

 



SWMBO's Daughter is coming over to -  morrow so she'll sleep in and Tom and I will hie off to the Long Beach Auto Swap Meet to look for new green seat belts for my Morris Minor and red ones for my Metropolitan Nash Sports Coupe .


There's usually at least one vendor of old fashioned " Airliner " typ safety belts .


Maybe a few cans of R-12 to re charge her '82 240D's AC system again .


SWMBO told me to take her out to lunch to - day instead of to - morrow , then said she wanted to ride on my battered old 300CD Diesel Sports Coupe .


She seemed to enjoy the working R-12 AC .


I got new hearing aids Friday and think the car is *very* noisy but she says it's not .


-Nate

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[diesel_mercedes] Re: Help with Klima I HVAC

 



No ;

You'd still get hot air , the defroster is supposed to run the AC compressor at the same time because it dehumidifies the air , making the defroster more efficient .

If the compressor still has any charge ,when the pump is running you should feel the outlet pipe getting cold .

Google ' Klima I ' or maybe ' Air Temp II ' to see how to test the evil servo , in a nutshell when you drive it to one extreme or the other , the motor inside it *MUST* run smoothly and stop with an audible " THUNK " ~ if it slows down and stops , it'll fry the amplifier behind the glove box . 

The very first thing to do is test and repair that damn servo then and only then can you begin the long arduous march to - wards working HVAC .

I wrote many detailed posts on the testing and repairs of this wretched HVAC system , good luck with it as I'd rather drive a Chevette than fool with KLIMA I ever again .

-Nate
       Mike   wrote :

I know I'm not in the diesel club anymore with my 280SE.  But I was wondering if you might be able to help me.

The servo does not work.  Only the defrost works.

So I jumped the A/C clutch to engage it by running a wire to positive terminal on the battery. 

My question is should he air be cold coming out of the defrost or not with the compressor on?

Thanks if you can help that would be so appreciated no one seems to know.

 Mike

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[diesel_mercedes] Help with HVAC

 

I know I'm not in the diesel club anymore with my 280SE.  But I was wondering if you might be able to help me.

The servo does not work.  Only the defrost works.

So I jumped the A/C clutch to engage it by running a wire to positive terminal on the battery. 

My question is should he air be cold coming out of the defrost or not with the compressor on?

Thanks if you can help that would be so appreciated no one seems to know.

 Mike

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Re: [diesel_mercedes] E300D wiring harness

 

wasn't that one of the cars made with the "green" biodegradable insulation?  There's green in that for someone.  I think the factory replaced some under warranty.  The Classic Center might be able to point you in the right direction.


On Fri, May 9, 2014 at 9:06 PM, mnijfo@yahoo.com [diesel_mercedes] <diesel_mercedes@yahoogroups.com> wrote:
 

My indie says I should replace the wiring harness in my 1995 E300D.  It took his shop 3+ hours to get my A/C working because of wiring issues.  Admittedly, they also replaced the compressor and performed a complete A/C service in that time, but at least an extra hour or so went into chasing "phantom" faults. I.e., it would work fine in the bay, but fail during the test drive (3 times), had relay problems, some bare/broken/frayed wires, poor connections, etc.  They finally got it stable after fixing the bad sections/ends of wires.

 

Can anyone recommend a good source for a replacement harness?  Car turned 200K miles last week, so I'm sure it's time.





--
Al Boucher

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[diesel_mercedes] Fuel Economy Check '84 300CD Auto

 


405 miles , AC used off and on , 3 Oz. of Marvel Mystery l used in the last fillup as I ran out of Startron and Diesel Kleen Cetane Boost .

25.8 MPG , consistent if not terrific .

The R-12 charged Klima II HVAC still blows cold too .

-Nate


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[diesel_mercedes] Voltage & Temp saga 1979 300SD

 




---In O.K. then ;

When I was running Klima I equipped Mercedes , I too had what I considered raised temperatures although I don't recall ever actually overheating one .

I did usually drill a tiny , 3/16" hole in the flange edge of my thermostats to help air bubbles from forming in the water jacket , this seemed to help a lot .

-Nate
       Bud    wrote :

Thanks all.  Had done a flush and changed the thermostat in the fall.  I did not do the citric flush though.  The system looked spotless and I believe the PO's mechanic used G05, definitely wasn't green.

Bud

On Tuesday, May 6, 2014 7:12 PM, "vwnate1@..." <vwnate1@...> wrote:
 

Hi Bud ;

Your W-116 uses the wretched Klima - I HVAC system , it's a PIA no matter what .

Your cooling fan is kaputi , get another one , OEM's are not terribly expensive but you can use any old aftermarket or junkyard fan as long as it's BIG .

Do not waste one moment fooling with the worn out bushings in the old fan , if it doesn't turn freely , any electric fan is bad even though it may still spin when connected .

No more than 10 amperes draw , it's supposed to draw 8 amperes Max.

Be sure to add a relay and not run the fan's current draw through any temp switch .

@ 100° C , your engine is running a bit warm , consider flushing the cooling system well using a dilute mix of Citric Acid Powder and water .

-Nate

     Bud wrote :

Well, I purchased a voltmeter that plugs into the cigarette lighter because I wanted to know what was going on. 

I think I've partially figured it out.  I've noticed when the temp gauge goes to about 110C my voltage was dropping and the car wasn't cooling off at speed unless I went downhill or flat and level.

In stop and go traffic at about 110C the car would cool to about 100C.  My aux fan would never come on.  So the engine driven fan is working.  It was hot out here last week so I'd figure the road temp was at 100F+.  Otherwise flat and level she's been running about 90C.

So I wired up a fuse and connected the aux fan to the battery and promptly blew the fuse.  I used a 10 amp fuse and I think the circuit uses a 15.  I decided to take the fan off this morning to inspect.  It seems stiff.  I've read where the bearings aren't sealed so I was thinking of tearing into it and see if I can clean them or replace them with sealed bearings.

The A/C is not working right now as my climate control system is a mess and I'm going to be working on that after I get the drivability problems (like the battery charging and temp issue) sorted out so that I don't have to worry about da wife using the car.

Anyone on list tear into an aux fan or am I wasting my time?

Thanks,
Bud
1979 300SD
Diesel Rides



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[diesel_mercedes] Re: E300D wiring harness

 



Contact Tom Hansen at The Mercedes Classic Center in Irvine , Ca. ~ they'll have the correct part at the right price , unlike your dealer or whomever .

You'll need to provide him the VIN to assure the correct part .

This is _not_ a junkyard part as some years Mercedes (like other German Manufacturers) used bio degradable plastics so a used one will be just as bad or fail quickly .

-Nate


     mnijfo   wrote :

My indie says I should replace the wiring harness in my 1995 E300D.  It took his shop 3+ hours to get my A/C working because of wiring issues.  Admittedly, they also replaced the compressor and performed a complete A/C service in that time, but at least an extra hour or so went into chasing "phantom" faults. I.e., it would work fine in the bay, but fail during the test drive (3 times), had relay problems, some bare/broken/frayed wires, poor connections, etc.  They finally got it stable after fixing the bad sections/ends of wires.

 

Can anyone recommend a good source for a replacement harness?  Car turned 200K miles last week, so I'm sure it's time.


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[diesel_mercedes] Driving

 


Correct ;

Preferably as hard and fast as it'll go .

-Nate



Joe wrote :

C'mon, Max - nothing wrong with driving an old Benz... right, Nate????

Joe

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