Last year We purchased a 2001 Mercedes Sprinter 313 cdi RV which had done 43000kms. Since then we have done 25000kms often in limp mode. We are very familiar with Mercedes service centres around Australia but no one can determine a solution for us as to why we lose power after 10 mins start up. Sometimes just a slight hesitation then it pulls away strongly. Other times if it loses acceleration no amount of coaxing or foot flat to the floor will encourage pick up. It has a new boost pressure sensor, a new pressure control valve, and brake pedal switch. Nothing shows up in the computer (s) and the problem appears to be worsening. We have to stop and wait sometimes 10 mins, sometimes an hour or two. Then it might take off as if nothing wrong. When going well it is running superbly. Getting very frustrated and broke! Can anyone shed some light?