If it isn't leaking now, it will. I assume you did this effort as a result of insufficient cooling or none at all.

Replace with an ACM evap that has the expansion valve attached.

Replace receiver drier and make sure your pressure switch on the drier is the red one or you need to replace that at the same time. I have an extra on if you wish to purchase.

My water hoses were a bit difficult to disconnect, but I removed battery to get better access and got it. I ended up taking the battery tray out and cleaning and repainting. Ever read the book "If you give a pig a pancake"

Order a oring kit for your heater core and replace the o-rings as an extra preventive maintenance.

Yes take the fan out to help you remove the box.

Leave the seats in place.

Replace all the vacuum pods while you have the dash out.

Get the printouts from the CD for all steps.

Take digital pictures of every screw you remove, because there are probably 6-7 different types.

There is a caution on removing the leg room flap arm so the plastic piece is not broken.

Everything is just like the book says, straight forward and no MB tools or MB 40 hr training required.

Inspect the shifter bushings when you disconnect the speedo from the tranny.

Put a few drops of ATF on the fan motor bearings while it is out.

Replace cabin air filters.

Use a pry bar like a Super bar to release the box from the firewall

You will need to replace the weatherstripping around the evap box. Cannot get this from MB. I went to Lowes. I think I used 3/4" wide and maybe 1/2" thick. I would not use plumbers putty as the sealer as it is not intended for plastic and non-stainless parts (unless you find a less acidic type). I used silicone based caulk - little messy if you aren't careful.

I never found the plug for the center vent dial light, so I cut the wire and reattached.

There are a lot of plugs to disconnect, so make sure you reconnect them all. I had forgotten the cigarette lighter and I had to remove the console again to find it.

I am sure I left something out, but plan well and take your time.

PS I have just completed mine and I think I might have damaged my ignition switch as a result of not removing it per the instructions. See my post on my fan acting irratic.

94 E320 ACC Fan Irratic After Evaporator Replacement

Olin