What kind of bulbs are the high beams? They look terrible compared to the HID's when they are on and what can i buy to make them look a whole lot whiter and brighter? Are there any aftermarket harnesses for the SL600? And does anybody know how to rig the fuel pump to keep working after 155 mph, because that is when it stops feeding fuel.

I'm pretty sure the problem your running into is that of a "fuel cut off" point, rather than a "fuel pump" problem per say.

In order to combat this problem, your going to have to manipulate the car's ecu. Sort of like a rev limiter. The car's computer is not allowing the vehical past a certain mph for safety reasons. Not only yours, but the vehical's mechanical abilities also.

Therefore, look in-to some sort of "Piggy Back" ecu
system to control the vehical's fuel cut off point.

I hope this is somewhat helpful.

Capone!