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Pelican Technical Article:

Dome Light Replacement

Tom Morr

Time:

30 minutes30 mins

Tab:

$141 (housing) $1.25 (per bulb)

Talent:

**

Applicable Models:

Mercedes-Benz R170 (1998-04)

Parts Required:

Replacement bulb(s) and/or light housing

Hot Tip:

Wrap masking tape around your wedge tool

Performance Gain:

The light works

Complementary Modification:

Remove, clean, or replace sun visors

Replacing a burned out dome light is easy. The dome light housing holds two 10-watt bulbs (Pelican Part #910152-012000-M97). The job is as simple as gently prying the cover off the light housing, lifting the dead bulb out of its clip, and inserting a new one.

Occasionally, the light housing is cracked, or a new bulb doesn't solve the illumination deficiency. This requires removing the housing from the upper windshield panel. Two spring clips on the light housing's seat-facing edge secure it in the windshield panel. Depressing these clips with a wedge that won't mar the windshield panel will release the light housing. You can purchase the Mercedes-Benz plastic wedge, Pelican Part # 115-589-03-59-00-MBZ or look for an alternate tool. After dislodging the light housing from its home, the plug and wiring can be accessed and assessed.

The light housing and cover are available new as a complete assembly (bulbs not included). The Pelican Part # is A170-820-00-01-MBZ.

Gently pry the cover off the light housing.
Figure 1

Gently pry the cover off the light housing. A plastic putty knife works. A wood cedar shim, possibly with masking tape protecting its narrow end, might be another option.

The cover lifts off once it's pried free.
Figure 2

The cover lifts off once it's pried free.

The bulbs (arrows) can now be easily replaced by spreading the clips that secure them.
Figure 3

The bulbs (arrows) can now be easily replaced by spreading the clips that secure them.

Two light housing retaining clips (arrows) must be depressed by a wedge.
Figure 4

Two light housing retaining clips (arrows) must be depressed by a wedge. We used a plastic putty knife. Once these clips are depressed, the light housing can be removed from the upper windshield panel.

The wires are held secure by a plastic clamp on the light housing (arrow).
Figure 5

The wires are held secure by a plastic clamp on the light housing (arrow). Slide the wires out of this clamp.

Depressing the tabs on the plug's sides (arrows) releases it from the light housing.
Figure 6

Depressing the tabs on the plug's sides (arrows) releases it from the light housing.

Here's a bulb removed from the housing.
Figure 7

Here's a bulb removed from the housing.

New replacement dome light housings are available.
Figure 8

New replacement dome light housings are available. The cover is included; bulbs are sold separately.

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Comments and Suggestions:
tech944 Comments: The interior light on my Mercedes is working but doesn't work when I open the door and it doesn't Dim it's self any ideas what it could be bulbs are fine for the working when I switched interior light on manually it works .?
August 16, 2017
  Followup from the Pelican Staff: The door switch may not be working correctly. I would start there. - Nick at Pelican Parts  
rt1092 Comments: I have 2 socket type bulbs not bayonet style with diffusers in front of them. Want to know how to remove diffusers without breaking them. It looks like a needlenose pliers will work.
August 14, 2015
  Followup from the Pelican Staff: Can you share a photo of what you have? You may have the replace the socket and bulb together. - Nick at Pelican Parts  
chicsaunders Comments: I'm looking at these instructions to use to remove a auto dimming rear view mirror. It says the wiring for the mirror is accessible through the dome light housing and I have a mic in mine as well. Do you have any photos that shows the mirror wiring and how to remove them from the damaged mirror?
June 26, 2015
  Followup from the Pelican Staff: No I don't, sorry. - Nick at Pelican Parts  
jnc Comments: But mine has a mic in the unit...
light housing built into the plastic covering...

so are the instruction the same?
June 18, 2015
  Followup from the Pelican Staff: May be a little different.

Article applies to: Mercedes-Benz R170 (1998-04)
- Nick at Pelican Parts
 

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Page last updated: Sat 9/23/2017 02:28:47 AM