A:AnswerLook underneath your steering wheel it should be underneath there does a plug might be to your left side once you open up the door look to your left side underneath the steering wheel you will see a maintenance plug
A:AnswerThe FIXD.com website says that “ FIXD works with all gas-powered cars and trucks built after 1996 and diesels built after 2008.” It works on my 2005 Jeep Liberty Limited so, it should work on your Mercedes with no problem at all. I LOVE mine! It even gets me a way to find the closest mechanic on the premium subscription.
A:AnswerSorry but, no, it doesn’t work if the engine isn’t on. The scanners have to be able to “read” your engine and that can’t happen if it isn’t running.