Thanks for reply
No owners manual in glove box, Dealer will order one. I read it on the gas flap saying Premium or E85 only.I changed the oil and filter when I got home but hove no idea how to acces the service indicator until I get the Manual. Dealer said it was changed but I don't trust them since it was a Chevy Dealer cheap oil.

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1995 E320
1998 E320
1999 E320 4Matic
2000 E320 4Matic
2000 ML320
2007 C230 Sport
2003 Cadillac CTS