hi guys. I have a 1988 300e. I was inside the car checking my a/c vacuum pods to see which ones aren't working. unfortunately, the center and the defroster weren't working. anyways, after i finished putting everything back together, i tested the a/c to make sure all was well(which thankfully was). but when i went to check out if it heated ok, it started to blow hot air then my heater hose exploded, leaving a puddle of antifreeze under the car. it's the one that connects to the engine behind the air filter housing.
i want to know if i did something wrong or did i just have a old hose or worse.
i added some r134a a couple of days ago cuz it was low and have been using the a/c alot lately, would this have anything to do with that. thanks.