How to replace ignition switch on Mercedes W123?
Rotate the assembly upward until the tumbler clears the front of the dash and remove the assembly. With the assembly out from the dash and column you can better see the release tab you will be depressing (red arrow). To replace the switch remove the three flathead screws (red arrows). You can now separate the switch from the assembly.
Where is the ignition plug on a Mercedes?
Turn the ignition key to the “I” position and remove the electrical plug in the back of the ignition switch. The switch should be exposed now that the cowl and instrument cluster have been removed. You will access the plug from the top of the ignition switch and cylinder assembly.
How do you change the ignition key on a Mercedes?
Because newer Mercedes models also use laser-cut transponder keys, you may need to have your ignition key re-cut or reprogrammed depending on the model of Mercedes you have. The first step, of course, is to remove the old ignition switch. Adjust the Mercedes telescoping steering wheel to the maximum extended position (maximum out position).
What causes a Mercedes Benz ignition switch to fail?
Repeated use of the ignition assembly may cause it to fail over time. Fortunately it is a relatively easy repair job. There are two parts that make up the ignition switch assembly; the housing and the switch portion.
Rotate the assembly upward until the tumbler clears the front of the dash and remove the assembly. With the assembly out from the dash and column you can better see the release tab you will be depressing (red arrow). To replace the switch remove the three flathead screws (red arrows). You can now separate the switch from the assembly.
Turn the ignition key to the “I” position and remove the electrical plug in the back of the ignition switch. The switch should be exposed now that the cowl and instrument cluster have been removed. You will access the plug from the top of the ignition switch and cylinder assembly.
Repeated use of the ignition assembly may cause it to fail over time. Fortunately it is a relatively easy repair job. There are two parts that make up the ignition switch assembly; the housing and the switch portion.
Because newer Mercedes models also use laser-cut transponder keys, you may need to have your ignition key re-cut or reprogrammed depending on the model of Mercedes you have. The first step, of course, is to remove the old ignition switch. Adjust the Mercedes telescoping steering wheel to the maximum extended position (maximum out position).
How do you change the ignition lock on a Mercedes 190E?
Use a 10mm Hex and breaker bar to remove the screw holding the wheel to the shaft (red arrow).Have someone hold the wheel while you break the screw loose, never use the steering lock to hold the wheel in place. In this photo you can see the airbag plug (green arrow) and horn connections (yellow arrows).
Why does my steering wheel lock when I Turn Off the engine?
If you turn off the engine with the steering wheel turned or turn the steering wheel after turning off the engine, the steering wheel lock can bind and prevent you from turning the ignition. How To Fix It: Fortunately, this is an easy fix. Just turn the wheel back and forth until the ignition cylinder is freed.
Why is my ignition not working on my Mercedes Benz?
It is possible that the battery in the car is defective, as it does not provide the necessary voltage for the ECU and the N73 Electronic Ignition/Starter Switch (EIS) to function properly. If the battery is dead or has low voltage / under voltage, the CAN communication between EIS and N72 may not function properly.
If you turn off the engine with the steering wheel turned or turn the steering wheel after turning off the engine, the steering wheel lock can bind and prevent you from turning the ignition. How To Fix It: Fortunately, this is an easy fix. Just turn the wheel back and forth until the ignition cylinder is freed.
What causes a Mercedes Benz key to not turn?
List of common problems and possible solutions 1 Locked Steering Wheel. New drivers always experience this at least once, so we thought we would include it in this list. 2 Discharged Battery Undervoltage. 3 Key Tumbler Defective. 4 Defective Electronic Ignition/Switch System EIS / N73. 5 Smart Key Remote.
What kind of key does a Mercedes Benz use?
While most Mercedes-Benz cars have the SmartKey some models such as the ML Class, SLK Class, Crossfire used a metal blade key up to 2005. Some models suffer from the defective key tumbler. We have seen cars with as little as 20,000 miles where the tumbler go bad. Make sure the steering wheel is not in a locked position as mentioned above.
Where is the release key on a Mercedes W123?
Working under the dash press in the release tab on the assembly by the locking collar (red arrow). You can use a 3mm Allen or other suitable tool. Once the tab is pressed in turn the key back to the 0 position and remove the key. The tab can only be depressed when the ignition is in the 1 position.
What to do if your Mercedes W123 is bouncing?
Engine having a hard time shutting off? Make sure to check and or replace your injector pump shut off valve. Overload protection relays are located in different places on different chassis, so check for the location of yours and follow these instructions. Car bouncing down the road?