Originally Posted by
M60A3Driver
Just my 2 cents:
Start with your gas cap, that would be the cheapest cause of a leak. Especially if you have a cheap aftermarket replacement.
Mine caused the gas light to flash and eventually the check engine light came on. One of the codes I got was the same as yours and the other was also Evap leak small. When I put the original back on everything was fine.
Thanks for the reply. I might not have made myself clear, I'm not trouble shooting the P0455 ODBII error, at the moment. I've bought a new gas cap only to have the same error. I'm not worried about that, right now, I'm trying to learn about the Mercedes specific codes. At the time I made those readings, the P0455 was "pending", no MIL light on at the time.