Go to www.precisionauto.com they sell the upgraded K&N air box the ASR defeat and I believe the chip upgrade. Note, the website is deficient, so order the free color catalog.

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• 1998 MERCEDES-BENZ E430
  
• OBSIDIAN BLACK METALLIC/BLACK LEATHER
  
• XENON H.I.D. LOW BEAMS
  
• DEBADGED (E430 REAR)
  
• AMG CHROMED TIP DUAL EXHAUST
  
• CARLSSON 1/6 CHROME (PLUS 1) WHEELS
  
• SLK "WREATH" WHEEL CENTER CAPS
  
• ALPINE CHM-S611 CD CHANGER