[R129 SL] SL-500 Air conditioning

[Peter Shelton]

Hi Fernando,

I am not too good at translating Italian but it seems like the following is a rough translation (I use Alta Vista) - Babel fish translator!

In order to resolve eil your problem it tries to put between the two you spin of the temperature sensor a resistance, therefore that the same sensor feels the motrore warmer than those that is in truth-in order to finding eil just value must take a variable potentiometer  to put it between the two coils of the temperature sensor that ago partirte the impellers and when the impellers stess epartono to 85° measuring the resistance value, My 1991SL as an example were of 700 ohm have put a 680 restitenza of ohm to 1% and now the impellers leave to 85° also and the instrument nell dashboard marks 90° and the water more not bubbles.  Hope this sort of helps!!!
Good to see 'Jan' back in the comments section.  Were you on holiday Jan?.
Regards, Peter S (alias Benzcruiser) New Zealand.

----- Original Message ----- 
  From: Dr. Fernando Menichini 
  To: SL Mailing List 
  Sent: Sunday, June 24, 2007 5:50 PM
  Subject: Re: [R129 SL] SL-500 Air conditioning


  per risolver eil tuo problema prova a mettere tra i due fili del sensore di temperatura una resistenza, così che il sensore stesso sente il motrore più caldo di quel che è in realtà-
  per trovar eil giusto valore devi prendere un potenziometro variabile metterlo tra i due fili del sensore di temperatura che fa partirte le ventole e quando le ventole stess epartono a 85°  misurare il valore di resistenza,  nela mia sl del 91 per esempio era di 700 ohm. ho messo una restitenza  di 680 ohm all'1% e adesso le ventole partono a 85° anche e lo strumento nell cruscotto segna 90°  e l'acqua non bolle più

  fernando
    ----- Original Message ----- 
    From: Jan Kuylaars 
    To: SL Mailing List 
    Sent: Sunday, June 24, 2007 3:42 AM
    Subject: Re: [R129 SL] SL-500 Air conditioning


    I filled up my AC with freon refrigerant and the dealer told me that the heat sensor for the two big air fans was defective.
    So when I was waiting for the traffic light the cooling from  the refrigerant was insufficient and then the pressure protective valve should blow the refrigerant out of the system. After replacing the sensor they filled up the system for the second time together with a colored fluid.
    I paid for the second time and after two months it sopped working again.
    After checking hey told me that the colored fluid had leaking out of the indoor unit. 
    To repair cost about 1300 euros. Say 1600 $. 
    I am now thinking what to do, do it myself with 15 ours labor and buying a used unit, or open the soft top.

    Greetings

    Jan.

      -----Oorspronkelijk bericht-----
      Van: r129list-bounces at mbcoupes.com [mailto:r129list-bounces at mbcoupes.com]Namens Cynthia Carr
      Verzonden: vrijdag 22 juni 2007 17:32
      Aan: SL Mailing List
      Onderwerp: Re: [R129 SL] SL-500 Air conditioning


      Oh My Gosh you just named every problem I am experiancing with my 91 SL500....I thought that I just had a Lemon... I spent 3000.00 dollars to the Benz dealer for Air Conditioning repair and was sent off to the Middle east.  When I returned 18 months later the Air wasn't working and Mercedes Benez wouldn't honor the previous work...I am so sad and frustrated.  It blows cool air for a while then hot....My mechanic can not find a leak in the system...Any one has any suggestions???


      Mrs. Cynthia A. Carr 
      Our greatest glory is not in ever falling but in rising every time we fall.
      Confucius


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