Just confirming, the proper charge for a W210 is 1 kg or 2.2 pounds.

The chart posted above relates to parameter 7. The high side kPa number divided by 100 converts to bar which is what is shown on the CCU.

I think it is odd, the pressure is in bar but the temperatures are all in degrees F on the CCU parameters.

Or just use the quick and dirty method: from parameter 7 to PSI multiply by 15. 1 bar is technically 14.7 psi, but since you are dealing with low resolution, multiplying by 15 is within the margin of error and easy enough to do in your head.

I concur with other posters, after my rebuild, the normal range for parameter 7 (high side pressure) is in the mid to high teens, parameters 3 to 5 (left/right heat core and evap temperatures) in the low to mid 30s, and parameter 8 (refrigerant high side temperature) is in the low 100s. I have never seen my high side pressure go over 20 (300 psi). This all on a 90+ degree day in Columbia, we have officially hit summer here already. It is supposed to be nearly 100 tomorrow, it will be interesting to see how it does.

Did you change the pressure and temperature sensors when you replaced the dryer?

__________________
The OM 642/722.9 powered family
Still going strong
2014 ML350 Bluetec (wife's DD)
2013 E350 Bluetec (my DD)

both my kids cars went to junkyard in 2023
2008 ML320 CDI (Older son’s DD) fatal transmission failure, water soaked/fried rear SAM, numerous other issues, just too far gone to save (165k miles)
2008 E320 Bluetec (Younger son's DD) injector failed open and diluted oil with diesel, spun main bearings (240k miles)

1998 E300DT sold to TimFreeh
1987 300TD sold to vstech