I have a 1998 e320 4matic that suddenly beeped and displayed "ETS" then "BAS" then "ABS" in the diagnostic window, and the associated warning lamps on the left lit and stayed lit. I can clear the diagnostics but the warming lamps never go out.

At first I was able to clear the condition by simply stopping and restarting, but it came back within minutes after restarting the car.

Now it happens every time at start up. I also noticed a loud buzzing noise coming from near the steering column when the key is turned to position two, that lasts for about five seconds.

I took the car into a Mercedes dealership who told me I needed an ETS pump for the low, low price of just $1200 plus three hours of labor and tax.

Now, I'm of the opinion there is an electrical short in this car, because: You can hear the engine in the AM radio, and, you get a shock every time you leave the car after it has been running. I'm thinking this short or whatever it is may have affected the ETS...etc. Also, I think that low voltage can cause similar behaviour. Do you agree? Maybe I just need a new battery, or relay, or to find some short (wish me luck).

If not, your opinions please! Thanks in advance.