Excessive voltage in the parking lamp circuit will translate to higher illumination levels, which may cause glare to oncoming vehicles, blinding their drivers temporarily. This condition fails to conform to the requirements of the Federal Motor Vehicles Safety Standard No. 108. Mercedes-Benz USA says it will notify owners of affected GLKs, while dealers will update the software of the electronic control unit that's to blame for this minor defect.
As for the second safety campaign, Mercedes is calling back certain S-Class models from the 2011 and 2012 model years, including the S 550, S 550 CGI, S 550 4-Matic and S 550 CGI 4-Matic, S 400 Hybrid, S 63 AMG, S 600 Bi-Turbo and S 65 AMG. 158 examples of the breed built between March 3rd through July 30th, 2011 have a glitch with the tire pressure monitoring system. Mercedes says that the system's indicators are prone to illuminate for a portion of the time required by the FMVSS Number 138.
Under certain conditions, the indicator may not re-illuminate immediately after the car is restarted as required. The German manufacturer explains that if all four wheel sensors in the subject vehicles are simultaneously malfunctioning, the car will provide an initial warning, but this warning will not repeat automatically every time you start the car, failing to remind the driver that the system is offline. MB will notify owners and affected vehicles will have the tire pressure monitoring unit reprogrammed.