ML 55 AMG fault code 9041

I have just joined (hence post number 1) and am looking for some help.
It has been like a warning light frenzy on my dash in the last 3 days

I went to an auto electrician today and was given the above fault code (9041) but he was unable to tell me what sensor etc is broken

Mercedes want £117.50 to tell me (1 hours labour as a minimium charge)
so I am hoping that the www will save we some money.Does anybody know what sensor/part needs replaced under fault code 9041?
Any assistance would be greatfully appreciated.
Chorlton.
codes start with a letter i.e. P (power train) B (body) followed by 4 numbers,showing the system and the sensor involved.
p0410 would be the secondary air injection system.
Once you get the proper letter and numbers,post them and help will follow
ohlordsome idea of codes on mb systems and why a good number is key to finding a solution
http://www.buellwinkle.com/MBOBD2.html
pm me when you post the code so I can be sure to get back to you.

Seems I'll need to find another auto electrician who actually knows what he's doing
.Many thanks for the link, at least now I'll know if their giving me a fault code or just a series of random numbers
.Chorlton.
Finding the fault £100
ESP control unit £400
Fitting the unit £100
Now running like new again so worth the £$£ IMO
Thanks for the assistance



