Hi all,

My 1995 E300D is having some AC issues and was wondering if you all have any suggestions. Here are the symptoms. Sometimes the air kicks on and somtimes it doesn't. When the air is on, I can see the compressor clutch engaged and spinning - when the air is off, no clutch engaging or spinning. So, I'm wondering if this is parhaps a switch or sensor issues? I think I am going to pull the clutch to see what it look like.

I have a set of gauges, but the readings aren't so clear. When the car is running, but the AC is off, I am getting normal to high readings on both the low and high pressure sides. I can't get the AC to come on so I can get those readings. Today I managed to get the AC to come on while I was out driving, so when I got home I left the car running and tried to get the gauges on. I only managed to get the low side on (I think I would have mangled my hand in the belt trying to get the high side on) and appear to have gotten a normal reading (40 psi).

Any suggestions?

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'95 E300D ("Tank") - 231,000 miles
'79 240D ("Biscuit") - 197,250 miles (Sold)
'83 240D ("Ding-Ding") - 217,000 miles (Death by deer)
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"Back off, man. I’m a scientist” ~ Peter Venkman