The Mercedes-Benz CL63 AMG front turn signal requires a PY24WNA bulb size while the rear turn signal uses a 12271NA bulb size. The replacement chart covers 2008 to 2014 model years with corresponding bulb specifications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Mercedes-Benz CL63 AMG uses the PY24WNA bulb for the front turn signal across all available model years, spanning 2008-2014.
The PY24WNA is an ANSI-standard bulb approved for use in the United States and Canada, distinguishing it from its ECE-standard counterpart, the PY24W, which is the international variant.
The PY24WNA operates at 12 volts and 24 watts, and its amber coloring is built into the bulb itself rather than produced by an amber lens.
The PY24WNA uses a PGU20-4 base, a wedge-style base with offset pins designed to allow only one correct installation orientation, which prevents reverse polarity fitment.
Because the PY24WNA is the North American regional variant of the PY24W, the two bulbs are not directly interchangeable despite sharing the same wattage and voltage rating, as the pin configuration differs to enforce regional fitment.
The rear turn signal on the CL63 AMG uses the 12271NA bulb for model years 2008-2010.
The 12271NA is an OEM part number designation rather than an ANSI or ECE industry-standard code, meaning it corresponds to a manufacturer-specific bulb rather than a universally catalogued type.
The natural amber glass construction of the 12271NA produces its amber signal color through the glass itself, a characteristic it shares with the PY24WNA used at the front.
The 12271NA is rated at 12 volts, consistent with the standard automotive electrical system voltage also shared by the front PY24WNA bulb.
The front and rear turn signals on the CL63 AMG use different bulb types, PY24WNA and 12271NA respectively, and the two are not interchangeable with one another.