It looks like I have a clogged expansion valve on my ACC, the compressor works but the low side draws about 7 PSI of vacuum with a full charge (high side spikes after startup but settles at 130 or so). I replaced the receiver dryer hoping it was the point of constriction but now it does the same thing and when trying to blow air through the TXV line all I got was a small flow...looking at the CD it looks like MB says to remove the steering wheel and instrument panel to get to it...is there any way to get at it from below or is it absolutely necessary to remove those to get to it?

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Marty D.

2013 C300 4Matic
1984 BMW 733i
2013 Lincoln MKz

Instrument "cluster" YES..instrument panel NO..

You also have to be a contortionist to un-blot the valve.

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MERCEDES Benz Master Guild Technician (6 TIMES)
ASE Master Technician
Mercedes Benz Star Technician (2 times)
44 years foreign automotive repair
27 Years M.B. Shop foreman (dealer)
MB technical information Specialist (15 years)
190E 2.3 16V ITS SCCA race car (sold)
1986 190E 2.3 16V 2.5 (sold)
Retired Moderator

My Faux Paux...yes, instrument cluster...

do you happen to know if the screen at the expansion valve inlet is removable for cleaning?

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Marty D.

2013 C300 4Matic
1984 BMW 733i
2013 Lincoln MKz