2004 Mercedes-Benz E320 Repair and Maintenance
A guide to problems, costs, maintenance and repair for your 2004 Mercedes-Benz E320
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2004 Mercedes-Benz E320 ProblemsEngine Performance Problems Due to Crankshaft Position Sensor Failure
The crankshaft position sensor may fail. Symptoms of this are: The engine will crank—but not start—especially when the engine is warm. The car may start again if it is left to cool off, but it may run roughly or have poor performance.
This vehicle has sensotronic brake control (SBC). If the SBC light on the dash illuminates, have the brakes checked. If the SBC is not working, limited brake pressure is delivered to the front brakes, increasing the distance it takes to stop. The SBC hydraulic unit has a specific service life programmed into the control module; follow the manufacturer's recommended service procedure for proper maintenance of the SBC.
The check engine light illuminated. An OBD reader confirmed a problem with the Secondary Air Injection System. I also noticed a loud roaring type noise for the first two minutes after vehicle starting. The problem was traced to a failed Secondary Air Injection Air Pump. Dealer wanted $1,300 to replace. I sourced a Bosch pump for the application and replaced it myself for around $450.
2004 Mercedes-Benz E320 QuestionsWhat would cause the car to vibrate like crazy while driving? (1 answer)
Past month noticed the car would start to vibrate so bad while driving I had to pull off the road. Get back on the road and can't duplicate. This has happened three times in last two weeks. One time I just slowed down until vibration went away then sped back up and all was good.
Battery was down and jump started, car runs fine with no problem but red light on dash board comes on and states that take to shop.
2004 Mercedes-Benz E320 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.