Can anyone help? Iv got a amg a45 2013 model, had it about 2 months now, when I first got it, it had all its power I think! After about a month there was a big power loss! Struggled past 70mph! Got it plugged in and came up with a fault on the boost pressure value “boost solenoid value” had that changed and it had a lot more power back but is still struggling at higher speed?? Can anyone suggest a problem? I’m getting it smoke tested next week to see if any leaks! There’s no more errors or lights on the dash so no clue where to go from there!