In one of the pictures it says rewiring required. how would i find out if my 98 slk 230 would need rewiring? how can i find out if it's halogen?

If your current SLK headlight bulb is an H7 then these will work for you. These come with the needed harness to convert. Wiring the Halo and LED is a different story. You will want to wire these into your marker lights. I did so by locating the wire that keeps marker light illuminated and ran the grounds to other grounds found under hood.

Brand	ACANII
Color	Black
Specific Uses For Product	Head Lights
Vehicle Service Type	Car
Year	1998
Special Feature	Waterproof
Auto Part Position	Front Right, Front Left
Lens Color	Clear
Lens Material	Polycarbonate
UPC	192925035042
Manufacturer	ACANII
Item Weight	15 pounds
Package Dimensions	21 x 19 x 14 inches
Manufacturer Part Number	AC-4-MBSLK98-1PC-HL-BK
Special Features	Waterproof

For [Halogen Model] 1998-2004 Mercedes Benz R170 SLK230 SLK320 LED Halo Black Projector Headlights Headlamps

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