The low beams for the 98-2001 are H7 and high beams are H1.. $16 for a bulb is too much, I can get them locally for like $5US each.. The new 2002+ low beams and high beams are both H7.. I had one customer who put those fake xenon bulbs in that was high voltage.. what happened was it got so hot it melted the plastic that was holding the bulb.. causing sparks and burn marks everywhere inside the headlamp assembly.. and both wires touched.. it was a big mess.. Plus Mercedes don't sell the bulb socket seperately.. he had to rip it off a headlight assembly.. Therefore its not a good idea to use those fake xenon bulbs, they're just gonna melt your wiring..