2009 Mercedes-Benz SL550
Mileage
89,067
Service Date
9/17/2020
Services Performed
- Bad systems battery causing too low voltage for many electrical consumers to operate normally once vehicle not running, recommend replacing battery to remedy
- BATTERY – Remove & Replace – Front or Rear – [Includes: Test. Includes: Perform relearn procedure.]
- Checked door lock operation, found at times nothing happens when key buttons pressed. Connected scan tool to vehicle, checked for available fault codes, many under-voltage codes found. Tested battery with tester, found battery fails load test. Connected ammeter to vehicle, checked for potential quiescent current draw on battery, found 4.6A draw once CAN network goes dormant. Determined draw coming from front passenger SAM module(which also has fault code for being defective, B1000). Performed hard reset of front passenger SAM module, found when CAN network goes dormant, now quiescent current draw goes down to 25-30mA, normal. Cleared all fault codes, no codes currently return. Charged battery over-night, found battery still fails battery test in morning, bad battery causing too low voltage for PSE module to operate door locks, recommend replacing battery
- Replaced collapsed transmission mount. Road tested vehicle, found some vibration still felt at times, recommend also replacing engine mounts at this time
- Replaced fuse for cigar lighter. Installed fuse, cigar lighter working normally
- Road tested vehicle, found worn/collapsed engine and transmission mounts causing vibration felt through vehicle. Recommend replacing engine/transmission mounts
STEVE F. gave our service a 5 star review on 9/28/2020
