Hi Guys,
I ordered my Expansion valve and o rings the other day, and apparently, there should be three different sized O Rings.

I need the inlet O RIng (lower right) that goes into the expansion valve. I got 2 of one kind and 2 of another, apparently this is incorrect.

Someone is apparently asleep at the wheel in Arizona......

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91 350SD
14 F150 Eco
19 Fusion Hybrid
11 GT500

Just about any parts store sells an assortment of a/c o-rings for about $2.99.

Yeah, I'm gonna have to pick some up tomorrow. Just frustrating when you order from someone who's supposed to know about Mercedes Cars. I've had 2 of 4 continental belt failures, a busted air filter, and a mispackaged belt from this certain vendor in the last 3 orders.

I guess I'll have to drive one of the gassers to work tomorrow, its not an option in Houston to drive with the weather like it is now...

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91 350SD
14 F150 Eco
19 Fusion Hybrid
11 GT500

Any idea what caused the belt failures? Were they the wrong size?

Just a thought, my 300D was eating one of the water pump/alternator belts about every 15K miles. It turned out to be a burr on the alternator pulley that was cutting them slowly until they shredded. I'm guessing that someone grabbed the pulley with vice grips or something. Anyway, replacing the pulley fixed it.

This is on the 420SEL, replaced the belts at 120K, and the Alternator belt shredded itself, a week later, the AC belt shredded. Both COntinentals, which was what was on there before as well. This is driven by my mother, who doesnt even drive the car 80 miles a week.

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91 350SD
14 F150 Eco
19 Fusion Hybrid
11 GT500

The probability that the failures were the result of defective belts is just about nil.