One problem related to wiring has been reported for the 1999 Mercedes Benz SLK230. The most recently reported issues are listed below.
1999 mb Slk230 - taillight assembly shorts out and brake light fails. This has happened 5 times, the most recent involving both taillights at the same time! they have not fixed the problem in the defective part now in 5 years. They keep replacing a defective part with a defective part!.