W210 - E320 Immobiliser Problem

John472

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I recenly found that my battery had gone flat.
I recharged the battery on the car and as it charged up the alarm was set off. Eventually this stopped, then I noticed at buzzing noise from the electrics box at the right hand side, rear of the engine bay.

I opened the box up and moved some of the wires and the buzzing stopped.
I continued to charge the battery. When it was fully charged, I tried to start the car but it would not start. The dash panel lights up an d looks as normal but the engine does not crank when the key is turned to start.

I think it is an electronic fault but I am not sure where to start. I am good with elecronics and have a multimeter etc but have no circuit infomation.

Can anyone help?

John
 
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John472

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This was caused by water entering the waterproof ECU box and caused dammage to the engine ecu anf assocated connectors.

John
 

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2002 SL500, 216 CL500, all fully loaded
I will look up the faults next week to see if known
 

BlackC55

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Try your spare key.

If not that I suspect the ignition switch as gone down.

have you checked the fuses?
 
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John472

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Thanks for you reply.

Unfortunately the problem is due to water, that got in to the ecu box.
The ecu is suspect and the connectors have been damaged.

I am still amazed that this could have happened.

A MB dealer quoted me circa 1500 pounds to repair.

John
 


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