It won't work right if you tried to retrofit a HID kit into your existing
headlight. You will blind all traffic.

However, your car did come with HID as an option so you can retrofit a
factory HID headlamp complete... for example Bekkers.com have a set but
whoa... they are asking $2600 for the kit. The performance is 4 times
brighter than european headlight

The second alternative is buy the European headlight kit... for about $1000.
This will improve your headlight performance by 3 times when compared to
factory headlight.

The third alternative is to replace those yellowed headlight lens with new
one... about $160 a pair. Install  Plus 50 or Plus 30 headlight bulb for
marginal improvement.

If you are handy with used parts... you could try to score a used set of
Mercedes HID headlight for your car.

Last alternative is have someone install projector HID lens into your
existing headlamt and  that will bring it up to HID level. This probably
will cost about $900 to do it... Make sure your headlight lens is perfect.

Whoa is right.  Thanx for the input...still confused.  Performance shops
pushing various bulb replacements ($15-$90 ea) leading to the confusion.
My lens' are crystal clear, just looking for a brighter bulb w/o blinding
others.