yeah,you dont want those....they get way too hot for the plastic that surrounds them....stick with the 3w bulbs....i didnt have much luck using LEDs either....ive used both the 5w bulbs and LEDs...im now using OEM 3w bulbs, if that tells you anything

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1985 300SD 192,000miles...Astral silver/ Grey MbTex

1983 300D 194,000miles...White/Tan MbTex...my newest addiction