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.

2002... | Answered on Nov 21, 2017

If you want to solve your problem, click on the link I attached 2002 Mercedes Benz S430 Workshop Service Repair Manual

2002... | Answered on Oct 26, 2017

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.
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.

2002... | Answered on Apr 07, 2017

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2002... | Answered on Apr 13, 2016

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 .

2002... | Answered on Jul 08, 2015

check fuses and read manual or other way around if you like

2002... | Answered on Apr 25, 2015

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

2002... | Answered on Dec 18, 2014

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

2002... | Answered on Dec 18, 2014

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

2002... | Answered on Nov 22, 2014

Join the mercedes owner forum.

2002... | Answered on Jul 29, 2014

The right hand lower button on the key fob opens/unlocks the trunk.
Go to
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.

2002... | Answered on Jul 21, 2014

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