2013 Audi A8 engine problems

Driving at speed limit on us highway in heavy traffic in the near northern suburbs of chicago, experienced sudden loss of power. Vehicle began running very rough and eventually stalled in left lane. Sudden lack of power, stall and unanticipated loss of speed nearly caused accident and did cause major traffic back up. Vehicle was towed to local shop. Diagnosis determined cause of sudden power loss was damaged turbochargers (x2).

While driving on I-20 in texas the epc light came on, engine power decreased noticeably. Limped off I-20 to an exit. When I stopped at the stoplight at end of ramp, engine quit. I tried several times to restart. Nothing but sputtering. Fortunately, I found that slight pressure on the accelerator while cranking would start engine. Engine would not run below 1000 RPM. Very dangerous having to keep engine running while navigating city streets.