Quote:
Originally Posted by ml28  Your certified mechanic is probably correct. He is referring to a sensor in the low gear switching motor that attaches with three bolts to the outside of the transfer case. When the car starts, it tests the motors sensor (possibly by cycling). When the sensor goes bad the computer puts the car in limp mode (second gear only). I replaced my motor a couple years back when I had my ML320 - the part was around $130 at the time and took about fifteen minutes to change out (three bolts and an electrical plug). I had no more problems after the replacement. If your certified mechanic has the equipment to read the transmission codes, he will probably see an error that says something like "transfer case motor - sensor out of range". I have the Snap-on MT2500 code reader with the 2003 Mercedes cartridge so I am able to read the transmission codes. Hope this helps. |
Good news (I hope) turns out it's a turbine input sensor that tells the tranny when to shift. I just have to find the part and the cost of the part. He will install it for $50.
Quite a scare but I'm sleeping better knowing it's just a sensor and not the tranny itself.
Thank you all again for your input.
I love this forum.
I'll keep ya posted.