Dear Fellow Brickboarders,

May this find you well. I just started to use newly-recharged aircon on a 93 940. I noticed what is obvious: the water removed from in-cabin air drips onto the passenger side frame rail, in front of the fire wall.

I did the following modification of the drain - so that the water does not fall on the frame rail - and am interested to know if it is sound.

I took a 10" length of 5/16 clear vinyl tubing (thinwall). I inserted one end of this tube 1/4" into the condensation drain opening and secured the tubing with butyl rubber tape. I formed a doughnut of butyl rubber tape and pressed it into place, over the mouth of the drain opening.

I ran the bottom of the vinyl tubing on the inside of the frame rail (the side closest to the engine), following the curve of the firewall down and backwards. I secured the tubing with a strip of butyl rubber tape, pressed into the angle where the firewall and frame rail meet.

Butyl tape clings strongly, but is removable. Over time vinyl tubing deteriorates, so this is not a 20-year solution.

Am interested to know if anyone else has done this, or if there are good reasons not to do this.

Thanks in advance for your guidance.

Yours faithfully,

spook