All I can say about it is this; The engine is designed to recirculate some of the exhaust gas directly into the intake. This flow is not included in the air mass flow sensor stream. I dont know how it affects performance. But I assume the MB engineers do and they probably did their best to optimize the engine performance with it installed.
I cant answer your questions for sure. Maybe someone else knows.
Why not just polish it up and make it look pretty. The tube is stainless and will polish up nicely.
I got too many cars!! Insurance eats me alive. Dave
78 Corvette Stingray - 3k
82 242 Turbo Volvo - Manual - 270k
86 300e 5 speed manual - 210k
87 420sel - 240k
89 560sl - 78k
91 420sel - 205k
91 560sel - 85k
94 GMC Suburban - 90k
97 Harley Davidson Heritage Softail - 25k
00 GMC Silverado 1 ton 30k