Make sure the system is flushed well. If metal particles are present, all the rubber hoses need to be replaced. The particles embed themselves within the rubber. Oil quantity is very important, must have enough oil. In addition I hope the Receiver dryer is always replaced when the system is open, failure to do so will cause moisture and contamination.
Look what color the Aux fan switch is on the rec dryer, if green, evac and change to the red one. The red turns the aux fans on much sooner causing lower hi side pressure.
Mercedes-Benz Master Guild - 2 years
Shop Foreman - 20 + years - dealer.
Part owner - MBZ Transmission remanufacture