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Originally Posted by mercedes230.625
is it low feron on your car???
I don't think so that it has cabin filter on 87 300E
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im not sure, where do i check? what is the correct level? and i checked the service records a little bit before, and it turns out that it was converted to r134.
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Originally Posted by MacGyver
I'm having the same problem with my 87 300E. The guy I bougt it from must have charged the system up right before he sold it, it was freezing on the freeway and did just OK below 40 MPH. Recently (2 months after purchase) it doesn't even do good on the freeway. I removed the low side cap to try and put more freon (134) and noticed that there was dye around the low side valve, so someone knew there was a problem with it before!
Anyway, is the fan working properly? I believe there are two settings. If not, I think it's the #7 fuse, try replacing it as there could be some corrosion between the fuse and contacts. In my case, I believe the problem is bigger and I'll have to have it diagnosed professionally.
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i don't know if the fan is working properly, how do i check? i just checked all the fuses and they seemed fine, none the less i replaced #7. still the same. ( while i was in there i replaced all of them )
oh and an additional question, my car is about to be due for an oil change and i want to get synthetic. i want to get the best out there possible for my car, a lot of people like mobil 1, but what weight should i use? my engine was rebuilt 5k miles ago and heads were polished so i doubt there will be any leaks anywhere.