2003 C240 doesn't start (key is not turning) after a couple of simple repairs

[Igor S]

Hello,

I've replaced a multi-switch (turn signals, wipers, etc.) and faded LCD in the instrument cluster according to reliable instructions. However, the car is not starting anymore, it looks like some security system blocked ignition switch, I cannot turn the key. I tried to disconnect the battery and wait; it didn't solve the problem. Can it be reactivated with some professional scanner or another tool? Any other ways to undead the car?

Thanks in advance,
Igor

 

[ajlsl600]

would retrace yr previous simple repairs and look fuses. check you did not dislodge anything

 

[Oldspanners]

Hello,

I've replaced a multi-switch (turn signals, wipers, etc.) and faded LCD in the instrument cluster according to reliable instructions. However, the car is not starting anymore, it looks like some security system blocked ignition switch, I cannot turn the key. I tried to disconnect the battery and wait; it didn't solve the problem. Can it be reactivated with some professional scanner or another tool? Any other ways to undead the car?

Thanks in advance,
Igor

Do you hear the ignition lock motor run when you insert the key, if not that's where to start.

 

[Igor S]

Do you hear the ignition lock motor run when you insert the key, if not that's where to start.

No, the car doesn't allow the key turning and doesn't react to it when I try to open/close doors remotely. Tried both keys with the same result.

 

[Flyinspanner]

Maybe you’ve slightly dislodged loom to the ignition switch?

 

[Igor S]

Maybe you’ve slightly dislodged loom to the ignition switch?

I will check this as well. I'm curious if I messed up wit SAS, could it disable the car? Does it need to be recalibrated after being removed? (It's the only way to replace the combination switch).

 

[LostKiwi]

When you say you replaced the instrument cluster LCD how did you do it?

 

[Igor S]

When you say you replaced the instrument cluster LCD how did you do it?

I've taken the cluster out and replaced the part with one I bought online. The procedure takes 10-15 minutes in total.

Similar to this video: Mercedes w203 Cluster removal and repair faded LCD Display

 

[simmon01]

I've taken the cluster out and replaced the part with one I bought online. The procedure takes 10-15 minutes in total.

Similar to this video: Mercedes w203 Cluster removal and repair faded LCD Display

Hi Igor, did you solve the problem ?
I’m curious because I have the problem on a W203. Apologies for jumping on this one Mods.