The Mercedes-Benz CL65 AMG front turn signal bulb size is PY24WNA or 2357NA, while the rear turn signal bulb size is 12271NA or 1156NA. The replacement chart covers 2005 to 2014 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 CL65 AMG uses two distinct front turn signal bulb types across its model years: the PY24WNA for 2008-2014 and the 2357NA for 2005-2006.
The PY24WNA is an ANSI-standardized bulb rated at 12V and 24W, built on a PGU20-4 base. It is the amber variant of the ECE PY24W specification, adapted for the US and Canadian markets.
The PGU20-4 base of the PY24WNA is a wedge-style single-filament base specific to that bulb family, meaning it is not interchangeable with standard bayonet-base bulbs.
The 2357NA, used in the front turn signal position on 2005-2006 models, is a dual-filament bulb rated at 12V with a high filament draw of 26.9W and a low filament draw of 8W, mounted on a BAY15d bayonet base.
The BAY15d base of the 2357NA is an offset dual-contact bayonet fitting. Its dual-filament design distinguishes it electrically from single-filament bayonet bulbs, and substituting a single-filament equivalent would result in incorrect function.
The rear turn signal on 2008-2010 models uses the 12271NA, which is identified by an OEM part number rather than an ANSI designation, rated at 12V with natural amber glass.
The rear turn signal on 2005-2006 models uses the 1156NA, an ANSI-standard single-filament bulb rated at 12V and 21W on a BA15s bayonet base.
The BA15s base of the 1156NA is a single-contact bayonet fitting. Although it shares the same physical base style as the BAY15d used on the 2357NA, the two are not interchangeable due to differing contact configurations and filament counts.
All four bulb types across both positions carry the NA suffix, indicating natural amber glass coloring rather than a clear envelope with an amber-coated or painted finish, which is a distinction relevant to light output consistency and regulatory compliance.
The front and rear turn signal positions on the CL65 AMG do not share a common bulb type in any model year covered by the specifications.