MB Transmission Service Tube

Question by duffster03 posted 6 months 1 week ago in E-Class

I'd like to service the transmission myself on a 2014 E-250 4 matic. Upon examination there is no service tube to put the tranny tool into to get a level reading, there is a plastic blind cap on top of the tranny where the tube should be. Can I buy a tube to access the transmission and install? Rahaal says no and wants $500 to flush / fill for 40K maintenance. HELP