M-Class (W164) Produced 2006-2011: ML280CDI, ML320CDI, ML420CDI, ML350, ML500, ML550

Different Battery Readings, CEL ML350

Old Nov 10, 2022 | 09:39 PM
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2006 ML350
Different Battery Readings, CEL ML350

I recently purchased a used 2006 ML350 3.5L V6 SUV 80k miles and have had some immediate issues unfortunately.
1. My key fob starts the car but the fob buttons will only lock/unlock right after the car is shut off for ~15 seconds until the vehicle goes to ‘sleep’ (after that the fob won’t lock/unlock even though the red light lights up when a button is clicked). I put new batteries in the fob and even bought a replacement fob from the dealer but still having the same issue. Anyone else have this issue? Could it be something with the EIS (poor signal…but only after the car fully shuts down / goes to sleep)?
2. Takes unusually long to start up the vehicle when turning the key. I hooked up directly to the battery under the passenger seat which tested fine. But then had the positive/negative ‘battery’ hookup under the hood checked which ‘failed’… could it be an issue with a wire that connects/signals between actual battery (under the seat) and the signal received under the hood? Thoughts?
3. Difficult to open the doors with emergency cut key. Need to jiggle quite a bit for it to pop/unlock. Guessing it’s something with the Locking mechanism…
4. Also had CEL pop up with code P0410 secondary air injection system, P2767 input turbine speed sensor circuit no signal.

Any comments would be appreciated, thx!

LC

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Old Nov 11, 2022 | 02:39 AM
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