Well, today I went to my Chrysler dealer and purchased a locking gas cap (part #05278655AB) for $15...looks and works great. They also had a different locking gas cap (part #5015636AB) which can be keyed that same as your '300 series' key, but that cap ran $40 + an additional $25 to have it keyed the same as the 300's key. Since I felt that $65 was just too much money for the convenience of only having to retain one key, I saved fifty bucks and opted for the $15 route. I simply don't mind having to carry an extra key for the gas cap, and besides, both gas caps look exactly the same (sans the plastic tether which comes on the more expensive version which I wouldn't need to use anyway).
I also solved the problem of always having been forced to allow the gas cap to simply dangle against my freshly waxed paint during refuels. I found a stainless steel spring clip (from an inexpensive 'aftermarket' visor vanity mirror left over from one of my other vehicles) in my tool box 'junk drawer'. One end of this clip just happened to slip into the fuel filler door's sheet metal fold-over gap, and since it's spring steel, it's stout and won't pull out. The other end is hooked enough to slip into the cap's lip area and easily holds my fuel filler cap while it rests against the open fuel filler door (ref. attached photos). Also, the clip doesn't get in the way when closing the fuel filler door, and since it's stainless steel, I'm sure that it won't rust either.
It was a simple solution to an irritating problem, and it didn't cost me a thing.
The money I saved on purchasing the less expensive fuel filler cap was applied toward front and rear '300 series' OEM molded splash guards (part #82208031 & #82208032 respectively) which cost me $76 for the complete set or four. I also purchased four cans of PXR (Brilliant Black Chrystal Pearl) OEM paint at $8.30 per can, which will be used to paint the exterior portion of the splash guards (with some paint hopefully left over....just in case).
I hope that maybe these ideas might help some other forum members who just might be facing the same dilemma.
I also solved the problem of always having been forced to allow the gas cap to simply dangle against my freshly waxed paint during refuels. I found a stainless steel spring clip (from an inexpensive 'aftermarket' visor vanity mirror left over from one of my other vehicles) in my tool box 'junk drawer'. One end of this clip just happened to slip into the fuel filler door's sheet metal fold-over gap, and since it's spring steel, it's stout and won't pull out. The other end is hooked enough to slip into the cap's lip area and easily holds my fuel filler cap while it rests against the open fuel filler door (ref. attached photos). Also, the clip doesn't get in the way when closing the fuel filler door, and since it's stainless steel, I'm sure that it won't rust either.
It was a simple solution to an irritating problem, and it didn't cost me a thing.
The money I saved on purchasing the less expensive fuel filler cap was applied toward front and rear '300 series' OEM molded splash guards (part #82208031 & #82208032 respectively) which cost me $76 for the complete set or four. I also purchased four cans of PXR (Brilliant Black Chrystal Pearl) OEM paint at $8.30 per can, which will be used to paint the exterior portion of the splash guards (with some paint hopefully left over....just in case).
I hope that maybe these ideas might help some other forum members who just might be facing the same dilemma.