Anyway Welcome "Selamat Datang" to Mercedesshop. I have a mint W124 230E in Indonesia that my dad apprently crashed
But I hope you get the problem sorted. Where do you take your car to?
I used to take it to Pt. Mercindo Perkasa I think or something like that..
and sorrry that I can't be of much help (especially when it comes to gas engines) but someone will help you out soon.