I have had a recurring problem where my car becomes really sluggish going forward, as though something is holding it back. The response and performance from the gas pedal gets worse and worse. At the same time, it appears the brake lights are stuck on.
Every time it has happened, mechanics have assured me that the two issues are totally unrelated and have fixed the brake light switch, and also replaced either the air filter, diesel fuel filter, or the air mass filter.
The car has just started pulling back again, only weeks after having the air mass filter replaced, and that was juts after a full service in which the air filter and diesel fuel filter were replaced. This is the third time it has happened. And just like the previous two times, I find that the brake lights are stuck on again.
Anyone tell me what is going on?