normally, I wouldn't throw money at a situation....but an expansion valve costs next to nothing...if you can have someone evacuate and recharge....
just make sure you replace the o-rings.... common leakage problem at the expansion valve....
i think the part is about 30 dollars.
1989 300ce 122k
( facelifted front,updated tail lights, lowered suspension,bilstein sports, lorinser front spoiler, MOMO steering wheel, remus exhaust,stainless steel brake lines)
1997 s320 103k (what a ride)
1972 280se 4.5 153k Owned for 12 yrs, sorry I sold it