Yes, my 97 SL320 was like that. The valve is open when things are sitting, it starts to close as the evap gets cold / pressure rises then is supposed to open when more cooling is needed. It is sticking shut not letting freon into the evap and stays stuck untill pressures slowly equalize with the AC off. There isn't anything to clean, a good brand like 4 Seasons is ~ $ 30 .

For most modern cars, there is a single nut holding the hoses on, then 2 allens holding the valve to the evap. There will be 4 different sized o rings that need a bit of compressor lube during install thought a bit of oil would be OK. If the nuts / allens are excessively tight, hold the block from twisting to keep pressure off the evap tubes.

When the expansion valve sticks / does not open, all the freon ends up between the compressor outlet and expansion valve. This is evident by the 0 PSI on the suction / low side and decent pressure on the discharge / high side.