THanks for the help Hristo and MBDoc!

"You could pull the tranny and replace the reverse piston seals and the reverse friction discs and be just fine. "

That is good info! Do u know the average cost for this?
Also, I take that back about it happening 20% of the time. It rarely happens, and it only happens when the car is fully warmed. It also only happens when I want to go faster than Idle speed. IE, I engage reverse, but want to go faster than a few MPH, so i hit the gas, and u can tell that REVERSE then engages fully...? Don't nkow if that makes sense.

BTW, Hristo, is the sound of noisy lifters.... or do they sound like a rattling? I get that from the engine and just can't figure it out! It makes me feel better knowing it's not the timing chain.

Thanks again for the info!!!!

__________________
2006 E350 w/ 155k miles (Daily Driver)

Previous:
1993 300E 3.2L Sedan w/ close to about 300k miles
2003 E500 Brilliant Silver (Had 217k miles when totalled!)
1989 300E with 289,000 miles (had for <1 yr while in HI)
03 CLK 500 cabrio (Mom's)
2006 C230k (Dad's)
1999 S420 (Mom's/Dad's)
2000 C230k Sport sedans
2001 CLK320 Cabrio (Mom's)
1995 C280 My First Mercedes-Benz... (155k miles. EXCEPTIONAL AUTOMOBILE. Was Very hard to let go of!)