I have a '95 C280 (M104 engine) and have a reoccuring CEL. The code is 'Adjustable camshaft timing solenoid without function (logic chain)' (P1341). My mechanic has replaced the camshaft adjuster magnet and the camshaft position sensor but the light continues to come on (the last time after 20 miles). What else could it be? What else will activate this CEL circuit?