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Rear Turn Bulb – PY21W / 7507 (FYI)

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Old 11-28-2015, 11:35 PM
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2012 E550 v8-Biturbo
Lightbulb Rear Turn Bulb – PY21W / 7507 (FYI)

Many of you may know this, but I ran into this issue so I thought I’d document it.

The rear turn signal bulbs in my 2011 (and I assume this is the same for 08-11 without factory LED) have guide pins that aren’t at 180 degrees from each other. Instead they are about 150 degrees apart.

I was trying to fit “standard” 1156 type bulbs in there but –of course- they wouldn’t fit as the 1156 type bulbs have guide pins that are exactly opposite (180*) each other.

The other rear bulbs (tail and brake) are of the 1156 type.

So, the correct bulbs you need for the rear turn signals are 7507 / PY21W (as clearly stated in the Owner's Manual -- but, of course, I missed it )

Just FYI

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