saw a C240 with the left rear light out....isn't another bulb supposed to substitute?
03-01-2002, 07:51 AM
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Toyota Tacoma & Lexus IS250
saw a C240 with the left rear light out....isn't another bulb supposed to substitute?
If you read the owners manual under EXTERIOR LIGHTS, it says that if a bulb in the rear tail light assy burns out another will double as a replacement for safety's sake.
This definitely was NOT the case with the C240 I saw.....all other lights were on with the exception of the left rear tail light.
what's up with that ?
am I reading the manual wrong or is MB just BSing...??
This definitely was NOT the case with the C240 I saw.....all other lights were on with the exception of the left rear tail light.
what's up with that ?
am I reading the manual wrong or is MB just BSing...??
03-01-2002, 03:34 PM
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2002 C240 6-spd (ret)
Interesting, but here's a thought. The left side has the foglamp, so I'm wondering if the same bulb has a dual filament whereas the right side has a single filament. Maybe there's still continuity in the circuit (the foglamp filament is still intact), so it doesn't sense the blow out. I wonder what would happen if it was the right side bulb? I may be totally wrong, but who knows?
03-01-2002, 08:02 PM
#3
The rear fog lamp is a separate bulb ( C-class Sportcoupe Operator's Manual page 349).
"Stand-by bulb function"
The stop lamps, dimmed, will act as a replacement lamp, if one taillamp stops working.
The left stop lamp acts as a replacement for the rear fog lamp, if it stops working.
The respective fog lamp, dimmed, will act as a replacement lamp, if left or right standing lamp stops working. (page 350)
"Stand-by bulb function"
The stop lamps, dimmed, will act as a replacement lamp, if one taillamp stops working.
The left stop lamp acts as a replacement for the rear fog lamp, if it stops working.
The respective fog lamp, dimmed, will act as a replacement lamp, if left or right standing lamp stops working. (page 350)
03-01-2002, 11:22 PM
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2005 smart cabrio; 2008 Mercedes-Benz B 200
hmmm
This sounds like a wiring/multiplexer problem to me. Not good. Bulb substitution is a good concept...assuming the electrical system isn't buggy 
