Diagnosis chassis -Repair -Replace fluids - Replace timing belt - suspension Repairs - transmission Repairs (Replacement gearbox) - change oil - Replace brake fluid (recommended 2 times per year) - Welding and many others.Dr. - Engine -Repair electrical -Replace wiring-Repair of starter -generator Repair -Scheduled maintenance -alignments -Computer diagnostics,error removal ,corrosion treatment,polishing"liquid glass".