yep when they really start to get into checking the vehicle they interogate everything. modern bmws have data stored in up to 40 odd ecus. on the mercedes in question they apparently replaced the clocks and adapted them to the car and old mileage reappeared despite the blocker claiming to stop all.
mercedes will in extreme cases send units back to the factory to have them checked for data, engine .gearbox, abs even airbag ecus . they will all log faults and mileages ets.
read a article some years back when ford were still fitting ecu ivs to mondeos etc about how in the uk only a quarter of the data is used in a ecu , in america they use the spare capacity to log eveything.
im sure if someone looks at the ops car they could in depth tell what fault occured and when down to time and date.
i used to do work mobile putting little faults right for a large repair centre years ago, when it was all the rage to have your car picked up after a accident and taken many miles away to an approved repair centre. cars would get delivered back and little things bulbs out faulty trim fit etc would warrant me going out instead of bringing the vehicle back for repair again.
had to go to a mk5 golf lady explained airbag had gone off just driving down the road and caused her to swerve into a parked car, was adamant. v/w refuted it and said not possible. the insurance had it checked out and found it had had 2 previous spontaneous airbag detonations with time and dates and the dealer had never said anything so all is possible if you look hard enough.
problem nowadays is time is money and folk dont want to pay . so most mechanics will just replace items and press buttons and move on to the next car.
sorry a bit of a rant.
mercedes will in extreme cases send units back to the factory to have them checked for data, engine .gearbox, abs even airbag ecus . they will all log faults and mileages ets.
read a article some years back when ford were still fitting ecu ivs to mondeos etc about how in the uk only a quarter of the data is used in a ecu , in america they use the spare capacity to log eveything.
im sure if someone looks at the ops car they could in depth tell what fault occured and when down to time and date.
i used to do work mobile putting little faults right for a large repair centre years ago, when it was all the rage to have your car picked up after a accident and taken many miles away to an approved repair centre. cars would get delivered back and little things bulbs out faulty trim fit etc would warrant me going out instead of bringing the vehicle back for repair again.
had to go to a mk5 golf lady explained airbag had gone off just driving down the road and caused her to swerve into a parked car, was adamant. v/w refuted it and said not possible. the insurance had it checked out and found it had had 2 previous spontaneous airbag detonations with time and dates and the dealer had never said anything so all is possible if you look hard enough.
problem nowadays is time is money and folk dont want to pay . so most mechanics will just replace items and press buttons and move on to the next car.
sorry a bit of a rant.
