The Mercedes-Benz SLK300 parking light requires a bulb size of 12961 for the specific lighting component. Data for the bulb size covers the range from 2009 to 2011.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Mercedes-Benz SLK300 uses the 12961 bulb for its front parking light position across the 2009-2011 and 2016 model years.
The 12961 is a Philips part number designating a miniature wedge bulb in the T10 form factor, which is one of the most widely used bulb types in automotive parking light applications.
T10 bulbs are named for their tubular shape and 10mm width, making them a compact solution suited to low-intensity positions such as parking lights.
The W2.1x9.5d base type found on the 12961 is a wedge-style base, meaning the bulb is held in its socket by the tension of the glass envelope itself rather than by a separate locking mechanism.
The 12961 operates at 12 volts and 5 watts, which is consistent with standard low-power automotive parking light circuits.
At 5 watts, the bulb draws a relatively small current, a characteristic typical of position and parking light bulbs that are intended to remain illuminated for extended periods without significant electrical load.
Because the 12961 shares the T10 form factor and W2.1x9.5d base with many other miniature wedge bulbs, substitution with electrically equivalent T10 bulbs rated at 12V and 5W is generally considered feasible in practice.
The front parking light position on the SLK300 uses a single bulb type without variation across the listed model years, indicating a consistent socket specification throughout that production span.