Mercedes Benz

Ignition coil primary current of cylinder 7 alternates between too high and too low. (P0357) Ignition coil primary current of cylinder 7 alternates between too high and too low. (P0357) Possible cause: ­ Primary current Affected functions: ­ Engine running ­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­ Test 1: Check component T1/x (ignition coil(s)). 1. Check component T1/x (ignition coil(s)). Test 1.1: Check component T1/7 (ignition coil cylinder 7). 1.1. Check component T1/7 (ignition coil cylinder 7). Warning!Hazard as a result of high voltage at the ignition system! ­ Electronic ignition systems operate within a hazardous power range both at the low voltage side (primary circuit) as well as on the high voltage side (secondary circuit). ­ Contacts with such parts can result in burns, heart flutter or cardiac arrest. Rules of conduct and protective measures ­ ­ ­ ­ ­ Persons with heart pacemakers must not perform any work on the ignition system. Switch off...