My car went in for a service and MOT on Wednesday 3rd June, delayed from 8th April due to pandemic.
On arrival I was presented with the paperwork and advised that there is a software update for the car that is voluntary, I had intended to have this done but for some reason changed my mind whilst speaking with the service advisor, my car has run faultlessly and I guess in the back of my mind it worriied me something may upset the performance.
The advisor said that the update could affect the mpg by up to 5mpg.
When I declined the update he did say I could have it done FOC at any time and that in his estimation around 70% of customers decline the update.
I do feel bad as I believe that this update makes the car greener although it is already an EU6 rated car.
I may yet return to have this done.
Robin
Thanks Robin - could you please tell me which dealership this was please and if possible the name of the advisor who told you about the 5mpg decrease please? MB Brooklands have categorically denied that it would have any effect on the mpg, and I also have an email from the above mentioned Harry Owrid of UK Customer Services quoting a statement from Daimler AG '.....has no relevant impact on the certified fuel consumption and CO2 emissions.....'.
If I can get some information contradicting this I would be very grateful.
Dylan