Mercedes Sprinter W5W 5W Auxiliary Bulb – Flosser | All Generations | #2825

A failed W5W bulb on a Mercedes Sprinter puts out a parking light, side marker, license plate light, or interior position light — small failures that add up quickly on a commercial van in daily service, and some of which are equipment violations requiring immediate correction. This is the Flosser W5W 12V 5W wedge bulb for Mercedes-Benz Sprinter vans, sold individually for replacement in any position using the standard W2.1×9.5d wedge base.

What This Part Does

The W5W wedge bulb is a low-wattage, small-format incandescent lamp used across a wide range of auxiliary lighting positions in the Mercedes Sprinter. Its compact wedge base — which uses the lamp's leads rather than a separate base shell — allows it to fit in tight sockets that cannot accommodate larger bayonet or festoon bulb formats. Common Sprinter applications include front and rear parking lights, front side marker lights, license plate illumination, cargo area lighting, and various instrument panel and interior courtesy light positions. At 5 watts it draws minimal current and generates low heat, making it suitable for enclosed or plastic-lens positions where a higher-wattage bulb would cause damage.

Common Symptoms of a Failed W5W Bulb

• Parking light, side marker, or license plate light out on one side of the van
• Interior cargo or courtesy light not illuminating
• Dim or flickering auxiliary light that clears when the bulb is reseated but returns as the contacts wear
• Failed inspection for parking lights, side markers, or license plate illumination
• Dashboard warning for exterior light failure on systems with bulb monitoring

When to Replace

Replace when the bulb is confirmed failed by direct inspection. W5W bulbs have a long but finite service life and typically burn out individually — replace in pairs for exterior positions to maintain even brightness across left and right sides.

Fitment

• 2001–2006 Mercedes-Benz / Dodge Sprinter (T1N) – Parking, marker, license plate, interior positions
• 2007–2018 Mercedes-Benz / Dodge / Freightliner Sprinter (NCV3) – Parking, marker, license plate, interior positions
• 2019+ Mercedes-Benz Sprinter (VS30) – Parking, marker, license plate, interior positions

✔ 12V / 5W / W5W / W2.1×9.5d wedge base
✔ Always verify exact bulb position requires W5W before ordering — consult owner's manual or existing bulb
✔ Sold individually

Part Numbers

• Manufacturer: Flosser — 4291 / 78279 / 12961
• Cross-reference: W5W / W2.1×9.5d / Osram 2825
• SKU: OSRAM2825