RepairPal Certified shops can diagnose and repair your 2006 Mercedes-Benz SL500. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.
Electrical - from inside vehicle , or oil? Brakes overheating due to improper function? Best checked out in person , when the smell/odor is present. Could be many things , hopefully not a safety/fire hazard.