Kan­ga­roo­ing & ‘LIMP-HOME’ Mode

Car Mechanics (UK) - - Project Mercedes-benz E320 Cdi -

 Our Mercedes started to oc­ca­sion­ally hes­i­tate on kick­down, when the ac­cel­er­a­tor pedal was floored. This was get­ting pro­gres­sively worse, with the car be­hav­ing like it was be­ing driven by a learner driver with no clutch con­trol. It only hap­pened un­der hard ac­cel­er­a­tion, but, on one oc­ca­sion, it re­sulted in the en­gine switch­ing to ‘limp-home’ mode.

At the time, we were en route to our lo­cal garage, MJ Mo­tors in Bat­ley. We crawled along the M621 at 55mph and, on ar­rival, plugged in their di­ag­nos­tic equip­ment. Two fault codes were raised, re­lat­ing to the boost pres­sure reg­u­la­tor and the ex­haust back pres­sure. The fault codes were cleared and we now need to gather more ev­i­dence.

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