I was looking for online "deals" on the 4 Oxygen Sensors I am getting ready to replace (100 k miles) and I found that
www.importec.com has Bosch stuff on sale. They are running a sale ( for how long I dont know ) on some stuff you may want. I have gotten brakes / rotors and some other parts from them before and have had great service and quick delivery. I AM NOT affiliated with this site or company other than being a satisfied customer. Anyway. @ the dealership 176.98 ea for O2 sensors. 144.90 ea. @ discount auto.
On sale for 64.26 each @ Importec.com - NEW BOSCH. I was going to order them last week from another online company @ 108.00 each, glad I waited.

Fuel filter was 69.89 ( 94.00 @ the local MB dealership.)

Sway bar bushing kit 25.25 ( 54.00 @ the local MB dealership)

Anyway for anyone needing to swap out the O2 sensors, this may be the time to do it.