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W202 hazard warning switch replacement

Albeit when the W202 was released, Jeremy Clarkson said "...every switch, every knob feels like it will last for a hundred years", sadly even the most well designed parts can wear out over time, with no help from the weather and elements.

In my car, which is now rolling close to it's 32nd birthday, the hazard warning switch has broken at it's axle, most likely thanks to the scorching summer sun. This issue is the most common one in my experience, two out of two cases had it - the other case is a window regulator switch, which despite the issue still operates perfectly.

For the process you'll need a Phillips head screwdriver, some prying tool (preferably plastic) and a radio remover tool (Becker if you still have the original headunit). You do not need to disconnect the battery.

 

- Remove the headunit and disconnect the harness and antenna from it. Put the headunit somewhere safe.
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- Undo the four screw holding the center panel - you'll find two at the bottom of the panel and two on the top of the radio box - the former two are countersunk screws, make sure you don't mistake them later. After the screws are removed, grab the bottom of the panel and tilt it outwards, then pull the top edge out from under the center vents.
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- The hazard switch, along with all the other buttons is fitted inside a bracket that's held to the panel by six clips. Remove the bracket from the panel, but be careful not to break any of the plastics.
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- Once the bracket is freed, remove the hazard switch - it's only held inside by it's contacts, there will be no clips or screws to undo. Install the new switch.

 

OE number for hazard switch: A1248200110
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- After testing the new switch, install the bracket back onto the panel, then the panel back onto the dash. The lower edge of the panel, where the screw holes are, should be slid between the bottom of the radio box and the upper edge of the storage cubby/cassette storage. Fastern the screws back to their respective holes.
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- Reconnect the headunit to the harness and the antenna, then slide it into the radio box. You should hear a pronounced click as it fits into place.
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Attention: While replacing the switch you'll disturb numerous old plastics. Be very careful not to damage any of them!


Note: With the facelift of 1997 the switches and their fastening have changed. The process described above may not apply to post-facelift cars.

Related video: Replacement of Hazard Warning Light switch on a W202 Mercedes-Benz C-Class

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