The Mercedes-Benz SL65 AMG uses PY24WNA and 1156NA bulb sizes for front turn signals, while rear turn signals require PY21W, 12496, or P21W bulb sizes. The replacement chart covers 2005 through 2011 model years with corresponding bulb size specifications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Mercedes-Benz SL65 AMG front turn signal uses two distinct bulb types across its model years, with the 1156NA specified for 2005-2008 and the PY24WNA specified for 2009 and 2011.
The PY24WNA is an ANSI-standard bulb rated at 12V and 24W, making it the highest-wattage front turn signal bulb in these specifications. It uses a PGU20-4 base and is the amber variant of the ECE PY24W, intended for the US and Canadian markets.
The 1156NA is an ANSI-standard, single-filament bulb rated at 12V and 21W. It features a BA15s bayonet base and natural amber glass to produce its amber output, rather than a tinted or coated envelope.
Because the PY24WNA uses a PGU20-4 base and the 1156NA uses a BA15s bayonet base, these two front turn signal bulbs are not interchangeable despite both serving the same function on the SL65 AMG.
The rear turn signal of the SL65 AMG draws from three different bulb types across its model years: P21W for 2005-2006, the Philips/Osram 12496 for 2007, and PY21W for 2008-2011.
The PY21W is an ECE-standard, single-filament amber bulb rated at 12V and 21W. It uses a BAU15s bayonet base, which is offset relative to the standard BA15s base to prevent incorrect installation.
The P21W is also an ECE-standard, single-filament bulb rated at 12V and 21W, but it uses a BA15s bayonet base rather than the offset BAU15s base of the PY21W. These two bulbs share the same wattage and voltage rating but are not interchangeable due to their different base configurations.
The 12496 is a Philips/Osram part number designation for a 12V halogen bulb used in the 2007 SL65 AMG rear turn signal, classified as a specialty application bulb within these specifications.
The front turn signal specifications for 2010 and the rear turn signal specifications for 2010 are not present in the provided data, while 2009 and 2011 entries exist for both positions.
The shift from ANSI-standard bulbs in the front turn signal position to ECE-standard bulbs in the rear reflects a mixed regulatory framework within the same vehicle, a characteristic sometimes seen in vehicles sold across multiple markets.