During the summer - a pretty hot one here in the North East, my '97 E320's freon level dropped very low- matter of fact, only had cool air coming out of the passenger side, hot from the driver side...
A quick trip to the dealer - - they emptied and recharged the system- but were unable to find any leaks- but added dye along with the freon- either the leak is extremely small or coming from the evaporator, which wasn't checked because of it's location...
Any insight into this would greatly - greatly - be appreciated- per the dealer, we're talking a huge job... and expensive...