[PDF] Powershift transmissions, type EcoLife, for buses - ZF intervals are therefore vehicle-dependent. Consult the owner's manual for your vehicle to check whether TE-ML 20, 20 or 20 applies. 2. Approved lubricant classes for EcoLife Product groups Vehicle classification acc. to owner's manual Lubricant classes for service fill (1) TE-ML 20 20B / 20C / 20F / 20G TE-ML 20 20B / 20C interview questions | InterviewAnswers Job interview questions and sample answers list, tips, guide and advice. Helps you prepare job interviews and practice interview skills and techniques.