2004 Mercedes-Benz SL500 Repair and Maintenance
A guide to problems, costs, maintenance and repair for your 2004 Mercedes-Benz SL500
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2004 Mercedes-Benz SL500 ProblemsHard/Soft Tops May Develop Problems Due to Age
As vehicles age, various problems may develop with the hard and soft tops. If problems are encountered, it would be recommended to have a technician familiar with these tops perform the diagnoses.
The evaporator temperature sensor can fail, causing the AC compressor not to cycle. If the AC compressor does not turn on, the AC system will not blow cold air. If the compressor is stuck on, the air will be very cold at first, before warming up.
2004 Mercedes-Benz SL500 QuestionsDoes car crank when belt breaks (2 answers)
Does the fluid leaks when the belt breaks
Among the many problems I have had with the top operation is one of the worst. I've had numerous problems with it and the most current is the car top will not line up properly with the windshield top so it will not close.
Can the top be rebuilt somehow to make it work
WARNING THAT SAYS: BRAKE MALFUNCTION STOP CAR. ALSO ABS LIGHT IS ON ALONG WITH A VERY ANNOYING BELL AND ENGINE RUNS ROUGH. ALTHOUGH NO CODES ARE STORED.
2004 Mercedes-Benz SL500 RecallsIncorrect Software Calibration May Cause Fuel Pump to Remain Powered in a Collision
There is a faulty software calibration that affects several areas including shutting off the fuel supply in a collision. This could cause a fire hazard during an accident. Dealers will reprogram this software. The Mercedes-Benz recall number is 2008 070001. This recall began during August, 2008.
Due to deterioration of the wiring harness connection or failure of the hydraulic pump, the sensotronic brake control (SBC) system may default to the hydraulic back-up mode. In the back-up mode, the driver has braking power sufficient to stop the vehicle, but greater brake pedal pressure is required and brake pedal travel will be noticeably longer. Dealers will install a bracket and replacement ground wire to the SBC pump unit on all affected vehicles. Additionally, dealers will inspect and replace the SSC pump unit in certain SL models. The Mercedes-Benz recall numbers are 2005070007 AND 2005110001.
High mileage combined with a high number of brake actuations, or a high brake actuation frequency, can cause the pump motor of the SBC to run out of permissible tolerances. As a result, excessively high pressure may build the high pressure line of the brake system. If this occurs, the system will switch into the hydraulic function mode as designed. Sensotronic brake control is disabled when the brake system is functioning in the hydraulic mode. Dealers will inspect the SBC hydraulic unit and replace it if necessary to correct this concern. The Mercedes-Benz recall number is 2004 050014.