My ML350 is due for Service D at 39000 miles as indicated on the cluster screen.

How different is Service D from Service A and B.

Also, should I consider getting auto transmission service or is it a big rip off as well brake fluid change?

Please advise.

 

they really arent rip offs but it is something that could be done. id go with the brake flush. MB recommends every year or two for that. that will keep water from corroding your brake system.

the trans service in my opinion can wait.