Originally Posted by looney
Has anyone modified it to make all four red segments light up? if so how?
Yes.. I went the expensive, but most 'factory', route.
I bought 2 outer light units (A117M0011F) which include the wire pigtails and the bulb holders.
The wire pigtails and bulb holders are NOT available separately from Lotus.
Then I removed the inner units (which in Euro/UK and probably Assie Elises) are only used for reverse lights and rear foglights) and, using a Dremel, I opened up the closed-off opening for the second bulb holder. (aluminium, small cutter and some sanding works fine)
Now the bulb holders from the units I just bought fitted in the inner light unit and I re-fitted them.
My car (2001 S2) still has the wiring and connectors fully wired for the inner lights, so I just plugged the pigtail connectors into the car's wiring harness and hey presto!
Full 'circles' on with the normal lights, brake light illuminates the outer half of the outside units and the foglights illuminate the inner half of the inner units.
Indicator and reverse lights (amber and white) stil work as usual.
This was the original design for the S2 rear lights, but type-approval rules meant that Lotus was forced to stop using the 'circles' of the inner units.
It seems that some Mercedes types use the same bulb holders for their inidcators or parking/city lights. So you may find some ig you remove the existing pigtail and take it to a few car dismantlers to see if they have something similar..