I give MB engineers an "F" on the serviceability of the 603 engine.

I couldn't get my '87 300SDL to start. I found 4 of the 6 GP to be open circuit. So with that many GP to replace, I decided to remove the intake manifold. What a PITA.

It would have so much easier to remove if the bosses that secure the injection lines were located so they were not directly above the intake manifold allen head screws. This could have been easily done by putting the bosses on the next intake pipe to the rear. If I can figure this out in about 10 minutes, why couldn't the MB engineers figure it out. I'm really disappointed because I use to think that MB were easily servicable.

I'm still wondering what made so many GP die at the same time. Most of the GP had a king's crown on them. Are those Monarch brand GP?

P E H