The Mercedes-Benz S600 front turn signal bulb size includes PY24WNA and 2357NA options, while rear turn signal bulbs measure 12271NA, PY21W, or 12496 in size. The replacement chart covers 1995 to 2013 production 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 S600 front turn signal uses two distinct bulb types across its model years, with the 2357NA fitted from 1995-2006 and the PY24WNA fitted from 2007-2013.
The PY24WNA is an ANSI-standard bulb rated at 12V and 24W, using a PGU20-4 base. It is the amber-glass equivalent of the ECE PY24W and is certified for use in the United States and Canada.
The 2357NA is a dual-filament bulb with a BAY15d bayonet base, rated at 12V with filaments drawing 26.9W and 8W respectively. Its natural amber glass coating produces the required amber signal color without a painted or dyed lens.
The rear turn signal of the S600 draws from four different bulb types across its production span, reflecting changes in both generation and regional specification standards.
The PY21W is an ECE-standard single-filament amber bulb rated at 12V and 21W, using a BAU15s offset bayonet base. The offset pin prevents accidental substitution with physically similar bulbs that use a straight BAY15s or BA15s base.
The P21W shares the same 12V, 21W rating as the PY21W but uses a BA15s straight bayonet base and produces white light. Its presence in the 1996 rear turn signal position indicates that amber coloring on that application is provided by the lens rather than the bulb itself.
The 12271NA is identified by an OEM part number rather than an ANSI or ECE designation. It carries a natural amber glass coating and operates at 12V, fitting the 2007-2008 rear turn signal position.
The 12496 is a Philips/Osram part number for a 12V halogen bulb used in specialty applications. It appears in the S600 rear turn signal for 1998 and 2003-2005.
The "NA" suffix present on the PY24WNA and 2357NA designations indicates natural amber glass, a construction method that satisfies North American regulations requiring the bulb itself to emit amber light rather than relying solely on an amber-colored lens.
The front and rear turn signal positions on the S600 do not share a common bulb type in any model year covered by these specifications, meaning the two positions require separate replacement bulbs.