Ok thanks and sorry for my mistakes. I apologize.

Here is what parts i ordered, with good and cheap prices :

USED --- 74mm Throttle Body - REF : A1131410125 (Mercedes Benz) // 0280750017 (Bosch)
eBay | Mercedes CLS W219 W 219 Drosselklappe 0280750017 A 1131410125 Motor M272
ONLY 70€

BRAND NEW --- 74mm MAF housing + sensor - REF : 0280217810 (Bosch)
eBay | New Auto Parts Assembly Air Flow Sensor Meter 0280217810 For 98-09 Mercedes
ONLY 15€

BRAND NEW --- O'Ring - REF : A3059970345 (Mercedes Benz)
MERCEDES BENZ PARTS STORE (on site)
ONLY 7.62€

Finaly, i will do this mod by myself and the cost of the parts are less than 100€ !
What a good deal !


Thanks everyone !


NEXT STEP : Removing the catalyst