I bought a clean 77K mile CA auto trans car last yesterday.

I have questions about 4 issues, please (and any othet advice for a car with this milage is welcome!).

1) The alternator has a rhythmic 'grumble" when hot, normal or failing?

2) Chrysler says at 80K change auto trans fluid with "Shell 3403 fluid only" Is this the same fluid a 2004 5-speed auto Mercedes Benz would use (so my local M-B guy will be OK)? Is the trans made by M-B or in the Chrysler plan that makes copies of the design (and shipped to Karman)? I am worried that Chrysler would use a differen friction lining material or someting that requires a different fluid. Any other suggestions on the subject?

3) Should I use the recommended Mobil-1 0-40 and a M-B filter for the engine? Does anybody have the M-B filer P/N handy?

4) Is the key and remote control fob a M-B or Chrysler item? Is the key available with the trandsponder chip but without the fob if I just want a spare key only? What do they cost with and without the fob?

Thanks for the help!