06G55

At some point my diff locks were being difficult. I bled them, there was one line in the front and one in the rear. The center is supposed to be electrically actuated.
Now I can easily activate my center and rear differentials, but I cannot activate the front.

Where should I look to fix this? Is it maybe the vacuum system?

chassis

There was a thread on this recently, focused on the booster servo, or vacuum amplifier, can’t remember the MB terminology.

06G55

Thank you for the info. Would you be able to link it by chance?

chassis

Have a read through this thread and see if it is similar to your experience.

https://mbworld.org/forums/g-class-w...ml#post8773034

06G55

It is exactly what I was looking for. I am a little worried that the 55 and 63 are very different but all of those photos look like my own engine bay. Thank you.

xxaarraa

That is my thread documenting my troubleshooting journey. I would skip all the early trial and error/learning and go straight to post #15. Good luck!

Also, when you are done, I recommend labeling all the vac lines in the locker servo area in hood by driver's firewall. I used painters tape and labeled each one for future ease.