If you have the late type distributor-LESS engine management systems (HFM-SFI systems) found on 92 and newer MB cars and still have the old OVP relay #000 540 5245, which can cause problem, you should replace it with new improved relay #000 540 6745. They cost 65-75 USD.
Image of #000 540 6745 :
http://www.peachparts.com/shopforum/showthread.php?threadid=47752&highlight=ovp+relay
Some more info:
http://www.peachparts.com/shopforum/showthread.php?threadid=18853&highlight=ovp+relay+fault
http://www.carelect.demon.co.uk/merc.html
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Patrik Sjoblom....1993 MB 320 CE......Bought Jan 2001. Only 16.8 mpg
Stockholm.........Silvermetallic....DEFA immobilizer/alarm + Original larm
SWEDEN............17x7.5 ET35 wheels with 215/45-17 Kumho 712 ECSTA .
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