[drwillb]

You will need to check for codes on the computer. These can help you figure out what's going on.

Last summer, my 2012 135 said the actuator was dead. This was after the usual clicking and ticking noises upon unlocking and opening a door. After a week or so the actuator noises stopped altogether. That's when it had died.

I went ahead and did the valvetronic motor replacement and programed the endpoints, etc. as per the manual. A couple of months later, the clicking and ticking started again but this time the codes said it was all beyond resetting. I did try the full eccentric shaft reset but it did not work. At that point it was time to replace the shaft.

Runs perfect now but it was a 12 hour job and tedious. Not difficult, but you have to dig deep to get it done. From my searching I found out that $3500 for the job is a common fee. Be prepared for that or more if you don't do it yourself. The shaft alone is a $900 part.

And, yes, if you're going to have the shaft replaced, definitely replace the actuator. It's only an additional part cost now vs. part + a few hours labor as a separate job down the road