I'm looking at buying a '93 Mercedes 300 D 2.5 Turbo (175,000 miles). Can anyone advise me about biodiesel compatibility? Do I just need to replace fuel lines w/ viton? I was advised (STRONGLY) against running BD in this car by the foreign auto repair shop that has been servicing this car for last few years because of injection system. I have been processing fuel and running an '06 Jetta on B100 for two years with no problems. Thanks for your help, Lori