W116, BENZ AID - COMMON QUESTIONS AND ANSWERS

Boom, Coolant vapor all over inside the cockpit

I recently got an 85 300sd with an engine that only has 92000 on it. The car drove great till I heated it up on a 30 min trip home from work during the hot part of day. I was just about home when I turned on the A/C, ahh it was nice and cold, but at a stop light the engine started to make some strange vibration and a few minutes later coolant vapor burst into the cockpit (not very nice while you are driving). I got the windows down and pulled over and the vapor slowed down, but the engine temp started to get hot.

Chassis Model Number

W126

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Diesel Engine Specific Aid

AC Part Time

1985 300DT For some reason the tach will quit working periodically, when it does the AC also only blows warm air. What is the connection and how can I repair it? You can stop, turn the ignition off and restart and everything will work correctly again...for a short time.

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Body and Interior Specific Aid

someone put 134a in my '84 SD. Can I go back??

I was getting things together to get started, new drier, new expansion valve, refrigerant and 'oil..' I was going to draw it down today-- and get to work this afternoon.. My freeze-12 (drop in "Freon" replacement) arrived a couple days ago.. Here's my problem.. Uncapped the lines, to find one has been "retrofitted" to 134a. My questions are: 1) can I just wrench that off?? It looks like it's just a screw on fitting. 2) the BG refrigerant oil is compatible with both 134 AND R-12 "freon" so I'm thinking that isn't an issue.. 3) do I need to replace the receiver drier and expansion valve, and pretty much, go on with my life??

Chassis Model Number

W126

Forums

Diesel Engine Specific Aid

valve orientation when installing manual climate kit

I have a question about the "Manual Climate Control Override" kit, specifically about installation of the valve included in the kit. The valve has an arrow on it, apparently indicating flow direction. But there was nothing in the MercedesSource instructions addressing valve orientation. Does it matter which way the coolant flows through the valve?

Forums

Body and Interior Specific Aid

Taxonomy upgrade extras

Instructions

Chassis Model Number

W116

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