The Mercedes-Benz SLR McLaren parking light requires a bulb size of 12961 for proper installation and function. Available data for the specified component covers the range from 2005 to 2009.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Mercedes-Benz SLR McLaren uses the 12961 bulb for the front parking light across the 2005-2009 model years.
The 12961 is a Philips part number designating a miniature wedge bulb in the T10 form factor.
T10 refers to the bulb's tubular shape, with the number indicating a width of 10 millimeters.
The 12961 operates at 12 volts and draws 5 watts, placing it in the low-power range typical of parking and position lights.
The base type is W2.1x9.5d, a wedge-style base where the electrical contacts are made through the glass pinch rather than a separate metal connector.
The W2.1x9.5d base designation is standardized, meaning the 12961 is interchangeable with other T10 wedge bulbs sharing that base type and the same 12V, 5W rating.