License plate lights
Back to: WIS 82.10 Exterior Lights
Issue - License Plate Lights
- The OEM licence plate light module has a design shortcoming. Due to the high temperature of the bulb, after a few years of use the plastic becomes fragile and the rubber washer becomes unreliable letting moisture through eventually causing corrosion of the bulb contacts or worse the wiring resulting in eventual failure.
- License Plate Lights may not work due to a blown supply fuse or a wiring fault.
Symptoms - License Plate Lights
- One or both License Plate Lights intermittent.
- One or both License Plate Lights not working.
- Bulb Failure Warning on the Instrument Cluster.
OEM Part - License Plate Lights
Original licence plate light module part number A220 820 03 56 or A2208200356.
Replacement Parts - License Plate Lights
Specification 12V-5W
- M-B part N000000002723 or
- LED replacement 36mm size
Make sure to get LED 5050 Car Vehicle Interior Dome Festoon with built-in CANBUS load resistors to avoid OBD error code on European vehicles.
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DIY Change Bulb - License Plate Lights
To change the bulb loosen both securing screws (1).
Aftermarket LED Modules - License Plate Lights
Cheap LED replacement License Plate Modules can be found on eBay. They produce very bright light and have proved to be quite reliable (using already for the second winter).
DIY Wiring Repair - License Plate Lights
Summary:
This is for problems where your license plate bulbs/lamps or just one are good but not turning on. Along with having the license plate warning light on the dash.
One snag you will run in to when diagnosing is that no power will be sent to the plate lamps unless the trunk is closed. I'm sure there is a way around this, I locked the latch and grounded it but that didn't work. Anyways with some of the panels you have to take off to get the lamp sockets out you will have holes to run your test leads through to pin the wire in different areas.
Acknowledgement
With thanks to BenzWorld members CarBizIndio et alia, with apologies.
Refer to:
http://www.benzworld.org/forums/w220-s-class/1627060-license-plate-light-lamp-not-working.html