Originally Posted by
jtrom
They were Bosch. I’ve noticed that when I take a slow uphill turn to the left or right, sometimes the car will bog down like it wants to stall but then clears up. I’m wondering if my problem could actually be a fuel filter .
Well Bosch is the original manufacturer of the MAF and oxygen sensors. Were the oxygen sensors the correct ones for the SLK320/Crossfire? Upstream are Bosch 16167 and downstream are 16276. I searched on Google and it could be a vacuum leak somewhere or even the downstream oxygen sensors. The fuel filter has a built in regulator and there is a port on the right side of the engine where you can check the fuel pressure. Probably best to take it to an independent shop that specializes in German cars versus throwing parts at it and guessing.