Report "Mercedes 190E. 1.8 Auto with Cat. Year 1992. 105-000 miles. Car started with difficulty AM. (Usually starts well) Drove 20 miles. stopped parked all day. started again well as it usually does, ten miles later cuts out and has not run since, will not start or even fire. Valve timing correct distributer OK. there is spark at plugs fuel to injector pump good battery,& starter. Help please"