I have a 95 E420 (pretty much the same engine). I had the ASR light come on, and it turned out to be a defective brake light switch.
I would not trust any of the codes until you know if you have a bad harness or not. Before I got a new harness, I had all kinds of codes (one even pointed to the air pump), but most of them were false.

My latest problem was a code that pointed to the EA (electronic actuator). It just so happened that the morning that my mechanic pulled the car into his garage, it backfired. He took out his reader, determined that it needed a Air mass sensor. After clearing all codes (including the EA code) no codes have since re-appeared (except for an unrelated code).

by the way... I had originally brought the car in to have the cabin blower motor replaced, not to fix anything else, since I firmly believed I needed a new actuator, and was going to shop around for a rebuilt unit.


So: check the brakelight switch and check the harness.

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It is a truism that almost any sect, cult, or religion will legislate its creed into law if it acquires the political power to do so. Robert A. Heinlein


09 Jetta TDI
1985 300D