Have a 1996 E 300 Mercedes Diesel. Had a problem with Glow Plugs and starting, a lot of smoke when starting. My mercedes mechanic in Florida told me to have them replaced if I stay late into Fall during cooler weather. Since weather has warmed starting is OK. Recently,this week engine light came on stayed on. Went to Advanced Auto and a free diagnosis and a code came and referred to the TPS. I called my mercedes diesel mechanic in Florida and he said not to worry. (I am presently here in Southern New England till late Fall.Will this hurt engine or make car fail? Does TPS regulate fuel consumption. Prior to this problem,all highway driving,car is getting between 35-38 mpg and city driving 27-27 mpg