After 2 hours of forum reading ther are still questions.
My 97 E320 has given me 3 codes. P410, P1519, and P1525. After reading other threads and ALLDATA I checked the resistance on my camshaft solonoid. It is 7.7 ohms. One thread said 4-6 was normal, another had 4-8 Ohms.
I reset the computer, and within 2 weeks had the codes again.
What is an " Air injection system malfunction"? Thanks for the forum,
Jeff