20 Most Recent 2002 Mercedes-Benz S-Class Questions & Answers

A easy fix is to put a battery disconnect on the negative post if the battery. Somewhat of a pain but cheap fix for now. Most of the time there is a light that stays on all the time.

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Just some suggestions. Clean the end of your key and get an earbud and metho/alchol and clean the keyhole sensor. Change the battery in your key. Check the charge level on the battery. Recharge. Check alternator charging. climatecontrol diagnostic menu To enter mode press "REST" for more than 5 seconds. Use the left & right Auto buttons to scroll. standing value code description 15 1 Inside Temperature 11 2 Outside Temperature 11 3 Left Heater Core Temperature 10 4 Right Heater Core Temperature 10 5 Evaporator Temperature 11 6 Engine Coolant Temperature 3 7 Refrigerant Pressure: displayed as 1.xx bar where xx is in the display 10 8 Refrigerant Temperature 0 9 Not Used 1.2 10 Blower Control Voltage: 6.0V 11 Emission Sensor: 2.4V 12 Sun Sensor: 4.1V 0 20 Control Current for Auxiliary Fan: 3.2mA (Is this value too low?) 0 21 Engine RPM: 44 => 4,400rpm 0 22 Vehicle Speed 0 23 Terminal 58d: 32 or 32% of Full Battery Charge 12.0 24 Battery Voltage: 13.3V 8 40 Software Status: 164 5 41 Hardware Status: 85 216 42 Variant Code 1st numerical value 14 43 Variant Code 2nd numerical value 50 Not assigned 51 Not assigned 52 Not assignd 60 Roof OPE/CLO 61 Left side air outlet, knurled wheel potentiometer Volts 62 Vacuum actuator 46, feedback potentiometer Volts 63 Center outlet, knurled wheel potentiometer Volts 64 Vacuum actuator 47, feedback potentiometer Volts 65 Right side air outlet, knurled wheel potentiometer Volts 66 Vacuum actuator 48, feedback potentiometer Volts Item 63 is the input signal from the thumbwheel controlfor the center vent, and 64 is the feedback signal to the controller giving it the position of the vent flap. As you move the thumbwheel these values should continously vary from a minimum of roughly .7 to 4.5.

Brake light switch at the pedal.

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Sounds as if it is in emergency service mode , if you can obtain or borrow an OBDC II reader ( I thinks it's OBD2 for that model ) it will show you the scan of the engine management diagnostics and give you fault codes corresponding to the faults in your car ( Know as DT's ) look on the Mercedes forums and they will tell you what fault codes mean .

Check your fuse chart and any fuse or relay that has to do with all your non functioning parts I recommend you checking with s tester you can get for five bucks anywhere they sell car parts or just pull them off and see if they are cracked or not

Replace the ignition switch. The vehicle ignition should not turn over the engine in the run position. No matter what you mess with.

brake light switch may need adjustment. if that is not it there may be a wire for another component shorting to the brake wire

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The right hand lower button on the key fob opens/unlocks the trunk. Go to www4.mercedes-benz.com/manual-cars/ba/cars/221/en/overview/oeffnen.html There is an interactive handbook at this address. If this fails consult your dealer, the fob may be faulty. There is also an S class owners forum for more help.