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Old 06-12-2001, 11:39 PM
Charles Charles is offline
Registered User
Join Date: Oct 2000
Location: Taiwan
Posts: 21
Hi John,

In your post "One reason the C-Class sompressors are so reliable has to with the fact that they run most of the time." does it mean the compressor always engaged when AC on? This is what I found on my 94 C220. It works not like those Japanese cars keep cycling the compressor on and off. I check the PBU item 7 by depressing REST a while then press FAN-UP to item 7, the reading goes up from 11.x to 16.x, then goes down to 11.x, repeatly. Seems pressure is OK. I wonder is there another internal switch in AC system to regulate the pressure?

Thanks in advance


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