This is my first winter with my 1990 2.8 760GLE Saloon. Unfortunatly I am suffering with a leaking boot/trunk seeming to concenctrate on the drivers side behind the rear wheel. But the water also seems to get in anywhere around the opening to the boot.

The car is usually parked on a small slope towards the drivers side, so this would be the natural run off path. Excluding the rubber drain pipe which I will test over the next week, are there any other common leaks in this area that 700 series Saloon suffers from.

Try placing talcum powder on the gasket and see where it goes: this will help pinpoint the leak. I lean toward a failing gasket or misaligned boot lid.

1)You can check to make sure that the power antenna is draining properly.
2)Ensure that the gaskets around the rear light assemblies are in good order
3)It may be time to replace the boot lid gasket altogether if it is the cause of your problems.
4)It might be possible that the lid is out of alignment and this can be slightly adjusted (just a little!!) at the hinge(need a 8mm allen key for a bolt that you can access throught the C-pillar inside car).

Rubber drain pipe?? - Is this the 1" diameter pipe by the boot lid? If it is, I think this is for venting the cabin air?

Just a few thoughts on where things might leak (saloon = 4door sedan right?? suggestions are for the 4 door variety!!).

Tim.