Hello,Please click here for the wiring diagram of the turn signal system on A-class
to show to your electrician.
Either the instrument cluster or combination switch is faulty.
Most likely it is the combinations stalk/switch on the steering column, which gives incorrect resistance to the instrument cluster. It makes sense to replace the switch before deeming the cluster to be faulty. A used one can be installed.Only new cluster can be installed, which will also require the coding with Star Diagnosis computer at the dealer or independent MB shop.
If replacing the switch will not help, it is worth to consult with this company about repairing of your cluster:http://www.clusterrepairsuk.co.uk/
Thanks for your help Stan.
The combination stalk switch has been replaced but the indicator problem remains so it looks like I have no option but to have my instrument cluster replaced.
There is no other possible cause is there?
Thanks again for your help Stan
after more than 3 weeks and having replaced the indicator stalk and having my cluster rebuilt the problem persists.
I did not even get onto the road from the garage yard because I had to indicate left to turn onto the road and the right indicator came on. I parked up again,left the engine running and the indicator switched on and went to tell the garage mechanic who was on the phone.
I stood watching the right indicator 'winking' but suddenly the left indicator engaged followed after a short time by the right again.
I am at my wits end and in despair, I have spent in excess of £250 not including labour cost for replacing the cluster which I still have to pay.
Is there anything else which could cause this problem?