Mercedes W210 EZS/EIS problem?

Question by Lmqcatarino posted 6 months 2 weeks ago in E-Class

I have a strange problem with a w210.

Key works on EIS and ESL works fine also.

Start the engine, but when taking out the key from EIS, the engine and dashboard still working. I have to disconnect battery to shut it off.

After remove key, the ESL works, but if i put it back on EIS/EZS the key don't turn anymore, just after disconnecting battery.

I read DTC's from EIS/EZS and give this code: B1156 control module electrical fault.

Any idea what could be the problem and how can I fix it?