I own a 2004 115 Cdi Mercedes Vito built in S.A. About 2 moths ago I had to make an emergency stop with the vehicle. The ABS malfunction and ASR malfunction indicators immediately lit up and never went out. A few kilometers later the rev counter dropped and coolant temp indicator lit up. I heard somewhere that it may be a result of a voltage drop to the on board computer. Is there any truth in it and if well, how can the voltage be restored? A agent already reset the computer, without success. Can anybody give advice on this problem?