I second the PMCS... My 98 with 205k has never stranded me but I know this is not the norm. Be regular with every fluid flush including brake fluid, keep an eye on everything and if something becomes marginal-replace it. Deferred maintenance costs a lot of money on these trucks as with any European car. I've never had bad grounds though (knock on wood) and I am not in an arid area. Still worth checking if you ever find mysterious electrical issues.