I just drained the ATF on my 2001 E430 4 matic a few days ago mixing the new 7 speed ATF with what ever was in there before and have driven ~100 miles with no difficulty. The only hangup I had doing the change was when I replaced the pan, the front passenger side portion of the pan got a little tangled on the metal frame thing and left a gap I didnt catch until I poured 2 L into the system. A expensive puddle formed on the ground. No worries though because I bought 2 L extra and managed to catch about 1 L of the fluid in a bucket. Great DIY, wish I had it a few days ago
