It should be in your owners manual under FSS.

If it didnt come with one go to MBUSA.com and order one.

It is prob here too under search FSS & 2005.

There are diff procedures for diff years.

__________________
Terry Allison
N. Calif. & Boca Chica, Panama

09' E320 Bluetec 77k (USA)
09' Hyundai Santa Fe Diesel 48k (S.A.)