Where is the A/C Expansion Valve on a 1989 mb e300

go to the radio's manufacturer's site and click on support for manual

Inside the car at the inlet to the evaporator core.

Here's a video from Scotty showing you how to replace your expansion valve,had mine replace not long ago,had Midas do mine. Replacing An Expansion Valve In Your Car ,hERE'S A NEW PART. Expansion Valve at AutoZone com Best Expansion Valve Parts for Cars Trucks...

infront of breather attached to manifold clean it but remember your problem is probabally vacuum hoses see my other post

Follow the a/c lines to the firewall. The part they are attached to is the expansion valve. Once the a/c system is evacuated the lines can be removed from the expansion valve. The expansion valve can then be removed from the EVAP core.

I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_d728a59f986299fa

Kia Sedona expansion FRONT valve located under dash, behind glove box, fan and coil. Evacuate freon first. Disconnect Freon lines from firewall., Lay right front seat back to flat horizontal position and lay on top or totally remove the seat for easier working access. Remove under dash cover, fan, glove box, coil housing, remove coil mounting bolts, remove old expansion valve. (Inspect old valve, if debris inside, blow out coil before installing new valve. If visible debris best to consider replacing REAR expansion valve and DRIER/FILTER in front of radiator too and blow out all lines and coils while servicing.) Use compressor oil to lubricate "O" rings on new FRONT or REAR expansion valve, install valve bolts, reinstall coil bolts to FRONT firewall or REAR frame, reconnect freon lines to firewall in engine compartment. Evacuate AC system, install freon (35 1/2 ounces, nominal 3 pounds), check system for leaks, check for proper operation, enjoy.

The low pressure lines are larger. Follow the larger line from the compressor to find the low pressure port.

Not sure what dual valve but go to buymbparts.com, autohausaz.com or call a dealer with the vin number and youll get the right one.

I haven't got the problem solve as of yet, I have a 190-e 2.6 mercedes benz 1989 not a e300 still checking different mech your insight give me much help and Im gratful for everyone for their good advice.

hello there

You need to spray WD 40 all around the wire and leave overnight you should be able to pull off the wire, always works for me.

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Thanks