I own a 2014 ML350 BlueTec. I'm really confused if I need to use 229.52 or if I can use 229.51
The cost difference between the two is about $30-$40 per oil change.

I wasn't aware of the sludging issue with these engines until after I bought it but have been diligent about changing the oil with 229.52 every 3k miles in the winter (it's cold in Chicago) and 5k miles in the summer. I found a gas station that sells diesel with less than 5% biodiesel so I'm good there (these engines don't like biodiesel).

I CarMax'ed it and bought the extended warranty to 125k miles. Current miles are around 65k. I'm willing to take the car to at least 125k miles (as long as I keep the warranty intact!) but I want to make sure I use the right oil - hence my confusion over 229.51 vs 229.52.

Mercedes says these can use 229.51 OR 229.52:

OM 642 - up to and including modification year 2016
except: OM 642 EU6 in BR 164.124/.824, BR 251.124, BR 221 (UK), BR 222 (UK)
OM 642 in BR 463.306/.336/.346
OM 642 Bin5 in BR 164.125/.825, BR 251.125 (only USA and Canada)
OM 642 EU4 in BR 221.122 (UK)

Those in the Except: bucket must use 229.52

My ML is a 166.024 with engine 642.826. I'm having trouble understanding Bin5, BR, etc.
Can anyone help me decode this and see if I need 229.51 or 229.52?