Air Con and Rear Diff
 

Can anyone tell me what type of gas i need for my A/C i need to refill and i can buy a can A/cgas refill !#$ i think he said it was but i'm not sure if its the correct type also what type of oil is used in the Rear Diff i'm hooping to change it tomorrow by that way its a 99 E200 W210 body and has 107000ish on the clock.

You need HFC134a for the air conditioner. Get the stuff without any additives, especially any leak sealers. Don't overfill it.

I put Mobil 1 85W-90 in my differential.

Nice one thanks. Is there a pressure setting for the Air Con to know when its full also Could i used 75W90 in the Rear Diff cause i cant find anywhere that has 85W90 in

A synthetic 75w90 would work fine and dandy

It's hard to mess up the Differential fluid change. Caution, loosen the fill plug first. You don't want to drain the oil and then discover the fill plug is in there too tight.

Based on your question about Air Conditioning, it is clear you know nothing about these procedures. You had better get good step by step instructions before you start loosening valves. Dangerous pressure involved. Not as simple as screwing on a can of refrigerant. You are dealing with a very expensive system and you really don't want to screw it up.
The system is designed for a specific quantity of refrigerant. The only way to get it exactly right is to have a shop that has the equipment suck everything out and replace with a specific quantity or refrigerant and oil.

Steve

I'm not sure that it takes a complete recharge to get the level right in a 210. They have the infamous warm left vent if you're just a bit low, so you know. You can also watch the high-side pressure when it's hot outside to see if you have too much. That said, it does take complete knowledge of the system to wing it this way.

Note that even with a complete evacuation and recharge, you still have no idea how much oil is in the system. That is, unless you flush everything out and drain the compressor.

Ok guys your dead rite i know nothing about the Air Con system but have since found out that its not empty but the cable that engages the fly wheel had be disconneced, have since reconneced the cable and the Air con is working but now i need to know two things. When the EC button is pressed and the little red light is on should the fly wheel be engaged or not and the other question and prob why the cable was disconnected in the first place is when the fly wheel in engaged its making a banging noice and its causing stress on the belt, you can see the tensioning wheel moving side ways, Any Ideas.