Does the A/C drain hose need to be cleaned out once in a while on these cars? (same as 300E). I can find it under the car but have no idea how to clean it out. I found no mention of this on the W124 MB CD or forum search.

The reason I'm asking...my A/C seems to be running a little warmer than usual. When my Volvo 240 A/C would run a little warm, I would clean out the drain and the A/C would run great. I could get to the drain hose by pulling it up through the inside.

I'd like this to be my first step before taking into my mechanic.

Thanks