I am having CE light, code P0455, troubles. My question for now is: can the purge valve located just above the vapor canister be disassembled and cleaned or is it a sealed unit? Replacements are not inexpensive!

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1984 300CD (sold)
1973 220DPK 4 spd (died)
1978 350SL 4 spd gray market
2003 SLK32 AMG
1988 300CE (sold)
1997 E420 (Totaled)
1998 E320 Wagon