PETERNYC

my tranny gasket and connector are leaking, I have the MB parts to repair, my question is, I'm the second owner, carfax tells me fluid was done around 60k, I now have 110k, the dipstick cap was all black and locked, I broke it open to check fluid and it is needed. I know to use MB atf134... if my car was service at MB dealer did they use 236.10 or 236.14? i'm going to drain and reuse the same fluid, and not change filter, at this point i don't want and issues. i'm down about 2 quarts, should I use 236.14, or use 236.10, the reason for that is even though carfax says it was done, I think it was not done because the cap was all black and locked, any help or suggestions will help me...