Can anyone please help. My 1995 E420 is acting up. The A/C is not blowing COLD Air. The air is strong, but it's not cold. I took it to the Japanese dealer here in Okinawa, Japan (the only 1) and I was told that the electrical system is good and can't find out why the A/C is not working. Does this have anything to do with Air/Dust filters? I'd appreciate any feedback.