Gearbox oil level check W210 E240
 

I would like to check the oil level in my 1998 E240 auto transmission gear box. I have bought the required dipstick, but I am unsure what gear box I have. The instruction give my options of three different gear boxes :- A722.6 A722.7 and A722.8 is there a simple way that I can identify my gear box? Thank you.