Electrical System Problems of Mercedes Benz SL550

Mercedes Benz SL550 owners have reported 7 electrical system related problems since 1996. Table 1 shows the 2 most common electrical system problems. The number one most common problem is related to the vehicle's electrical system (6 problems). The second most common problem is related to the vehicle's trunk wiring (1 problem). For details of each of the problem category, use the links in the table.

Table 1. Electrical System related problems of Mercedes Benz SL550

Problem Category Number of Problems
Electrical System problems
6
Trunk Wiring problems
1

Recently reported Electrical System problems of Mercedes Benz SL550

The Electrical System problem

I purchased this vehicle in a private sale in September 2025. The battery warning light was on and the radio was not working either. I had the vehicle inspected by the mercedes dealer and was told the batteries were being drained because the bcm (battery control module) I was told there was nothing   Read details...

The Trunk Wiring problem

This vehicle caught fire on its own while parked in a locked garage. The fire was in the trunk and involved various electrical and mechanical components and wiring harnesses. The car filled with dense smoke which coated everything with thick soot.   Read details...




SL550 Service Bulletins
SL550 Defect Investigations