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Large_Crab 09-12-2005 01:00 PM

Lighting issue

I recently noticed my right side headlamp only works when in high-beam mode. I'm real new at this, so I'm not sure if its the bulb or something else that needs replacing?

Also, while I'm at it, I have two other related questions---the plastic frame that the light sits in has been destroyed, and I need a new one. Is this a tough job to do alone, or should I take it in? Also, can anyone recommend that best manual for my car? I have a 1984 300SD Turbo.

thanks in advance.

Large_Crab 09-12-2005 04:32 PM

OK, I kinda found my answer to the bulb switching thing...but I'm still in the dark as to how to approach installing a new headlight frame. I've never done anything like this before.

Can anyone offer insight, or a link to a thread here? Sorry if this has been asked before.

Pete Burton 09-12-2005 04:36 PM

try this for manual info: should explain changing bulb, frame and much, much more.

Large_Crab 09-12-2005 04:39 PM


Originally Posted by Pete Burton
try this for manual info: should explain changing bulb, frame and much, much more.

awesome, pete, thanks a lot! I'll post on how it goes. it'll be my first repair with this car. :eek:

SD Blue 09-12-2005 05:37 PM

You can't get much easier than changing the headlight frame.

Open the hood, look at the backside of the headlights and note the large white plastic knurled knobs. I believe there are (4) headlight and (1) side marker. Remove the knobs and pull straight out.

They are available aftermarket and you may even find a decent one in salvage.

Diesel Power 09-12-2005 07:38 PM

I just dumped my US stuff for Euros. There are three plastic knobs that hold the frame in place. Here's a link to the part:

Craig 09-12-2005 07:44 PM

I think this actually the part you are looking for:

You should be able to find a used one someplace, eBay, salvage yard, etc.

Large_Crab 09-12-2005 08:33 PM

Yep, that's the one---I'll be getting it shipped in a day or so. Does it take a regular philips screwdriver? hard to tell from that angle.

I assume that if a bulb works in high beam but not low beam...the bulb itself is the problem, not the wiring, correct? Never changed one of those either.

thanks guys!

HIDGolf 09-13-2005 02:23 AM

A filament is used to produce light inside your headlamp. You have a filament for each function. One for low and a second for high. The low filament is most likely broken due to age and useage. Replace the bulb, or sealed beam in this case, and be on your way! I suggest replacing bulbs in pairs as bulbs reduce their intensity with useage. It might be a good idea to check the aim of the headlamps too.

check out for everything from simple FAQs to advanced theory in vehicular lighting.

PM me for more q's or info.

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