Got the warm left/cool right AC problem with my 210 chassis. I am assuming that I may be low on refrigerant. Below are the diagnostics I just did. Would someone please verify this for me? When I do recharge, can I just use the high pressure indicator on the climate contol unit to monitor the pressure, hook up the new refrigerant to the low side and stop when I reach the appropriate pressure? Can someone post the appropriate pressure/temperature curve for me to follow please?

cold engine/ warm engine/
not running warm & idling
1 75 87
2 71 73
3 75 66
4 73 53
5 75 67
6 76 166
7 4 bar 11 bar
57 psi 156 psi
8 73 121

Thanks.

Len
'99 E300TD 90,000 miles