Electronical Issues

[22011]

Hello Folks.
I noticed that my car C180, W203 Petrol from 2004 has few electronical issues and I don't really know what's the possible source.
Initially first issue I spotted when I was replacing one of the door actuator springs. The door for some reason wasnt receiving no power to the Lock signal. Causing the lock to keep jumping when locking/unlocking.
Next issue is sometimes when I drive with radio on. Sometimes the entire command system just completely shuts down without warning.
Lastly recently I took my car to mechanic due to it it is sometimes stuttering on low speeds when driving from cold.
Had mechanic run diagnostics and it popped quite few Errors which showed mainly electrical issues such as P2002 B37 Pedal Value Sensor and C1212 Over Voltage at terminal 30. Amongst others which appear to be Electronically related.

The mechanic cleared the codes and stated that they didn't appear again. Nor I'm getting any Issues on Dashboard.
I checked the Battery power using the instrument screen. And it showed the normal 13.5v when engine was running.
Does anyone know what may be the issue?

 

[Wearsafoxhat]

Probably the battery, it may show 13.5v when running but could well be on its way out. Wise to check it with the engine off aswell. Should still read above 12 volts.

What voltage was the lock signal if not none ?.


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[22011]

just checked the voltage.
When the engine is off. The Instrument screen says it's 12.2V. When Locking/Unlocking it momentarily drops to 12.1/12.0 before coming back up to 12.2

 

[malcolm E53 AMG]

MB electronics don’t like under current batteries it’s the first thing to replace to cure spurious faults a healthy battery should read circa 12.6V engine off and circa 14.5V engine running

 

[LostKiwi]

12.2v is too low. Minimum no load after resting 1 hour should be 12.4v.

 

[22011]

MB electronics don’t like under current batteries it’s the first thing to replace to cure spurious faults a healthy battery should read circa 12.6V engine off and circa 14.5V engine running

12.2v is too low. Minimum no load after resting 1 hour should be 12.4v.

Okay. Thannks folks. Will look into buying new battery!

 

[daibevan]

Give Tayna batteries a try, good prices & next day delivery.