W 220 Ignition, unlocking, and starting problems.

Bowruss

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Hello to all. Could anyone help us out with this?

My brother has an S Class 500 (it's a post up-lift model with full screen Command) which has suddenly started showing the following symptoms for no apparent reason and which the local Mercedes dealer/repairer cannot identify because it just doesn't happen when it is in the workshop....

On approaching the car for the first time during the day the following things may happen, but sometimes don't!

1. Fob key won't deactivate central locking.
2. To gain entry I have to use the detachable metal key.
3. Car alarm goes off
4. Putting fob key in ignition has no effect other than a series of regular intermittent clicks.
5. Radio and satnav still works.
6. Car won't start.
7. After about 2 minutes the car starts as if nothing was ever wrong.
8. When taken to the Mercedes workshop no faults appear on the diagnostics.

This is an annoying intermittent fault, made very worrying by the possibility that it might happen when he's away from home and he might find that the fault has stopped being intermittent and become permanent and leaving him stranded God knows where and at any time of day or night.

Can anyone help?

Thanks, Russ.
 

colechelle

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sounds like the EIS is starting to go, common fault and dealer only repair!!!
 
OP
B

Bowruss

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E Class Estate 211 Avantgarde 2004 with sports option, Comand, etc.
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Thanks Colchelle.

What's an EIS please? Sounds like a complex and expensive gizmo....

I was hoping someone might think it could be the brake light fault that I've seen referred to on some posts. That sounds a bit cheaper to fix!

Russ.
 

eGuru

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sounds like the EIS is starting to go, common fault and dealer only repair!!!

Agree with Colechelle. I had exactly the same symptoms. It gets worse with time and also when its cold. However it is not dealer only repair. Ordered EIS from dealer, £309 plus VAT. Rented 'green key' from dealer as well and independent fitted and coded within an hour.
Be aware you will need your V5 and some form of ID to order the EIS. Green key is £150 which is refundable.

ps EIS, Electronic Ignition Switch
 

television

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Agree with Colechelle. I had exactly the same symptoms. It gets worse with time and also when its cold. However it is not dealer only repair. Ordered EIS from dealer, £309 plus VAT. Rented 'green key' from dealer as well and independent fitted and coded within an hour.
Be aware you will need your V5 and some form of ID to order the EIS. Green key is £150 which is refundable.

ps EIS, Electronic Ignition Switch

I will go along with the above as the way to go about it
 


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