Does anyone know how to reset the Service A light and the Malunction memory light on the dashon a 2003 SL 500?

 

You can't do it without special equipment. You could use one of the diagnostic interfaces sold on eBay. Do a search on "Carsoft" and "Mercedes". The results should fall into two basic types. Forget those selling for around $120, as contrary toclaims made, thesegenerally only work withcars from the late '90s. Your car requires the more expensive type whichis sometimes sold for as little as $220 but is usually around $300. If someonewants to send me an email I can reply with a link to one of these interfaces.