Did I MIS-DIAGNOSE This Mercedes?? (GL450 no A/C)

Uh oh... The 2012 Mercedes Benz GL450 is back with a no A/C complaint. Owner wants it fixed ASAP because he's taking his family to sweaty South Carolina in a few days. He already replaced the A/C compressor, but obviously that didn't fix the problem. I perform the diagnosis and make a recommendation. The owner follows through, but STILL NO A/C!! Did I make a BAD CALL? Or was the replacement used part DEFECTIVE?? ASTRO DVOM: https://www.amazon.com/dp/B07FDBW1PT?... THINKTOOL PROS: ***$170 OFF!!*** https://www.amazon.com/dp/B08XXWHQVJ?... Enjoy! Ivan

Part 2: Did I MIS-DIAGNOSE This Mercedes?? (GL450 no A/C - Crazy REPAIR!)
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Part 2: Did I MIS-DIAGNOSE This Mercedes?? (GL450 no A/C - Crazy REPAIR!)

ESP-Dilemma in E-Klasse! 🤔 LIVE-DIAGNOSE! Lenkwinkelsensor wirklich kaputt? Besuch aus Australien 🇦🇺
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ESP-Dilemma in E-Klasse! 🤔 LIVE-DIAGNOSE! Lenkwinkelsensor wirklich kaputt? Besuch aus Australien 🇦🇺

Signs of bad AC compressor vs Pressure Switch (how to Fix, test, and reset)
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Signs of bad AC compressor vs Pressure Switch (how to Fix, test, and reset)

$ Luxury Mercedes $ Dead every morning! Can we fix it?
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$ Luxury Mercedes $ Dead every morning! Can we fix it?

Mercedes/ Dodge Sprinter A/C Not Working!  ( Variable AC Compressor )
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Mercedes/ Dodge Sprinter A/C Not Working! ( Variable AC Compressor )

Rick's How to read and clear OBD1 codes - Mercedes 1988-95
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Rick's How to read and clear OBD1 codes - Mercedes 1988-95

MERCEDES NO START / NO IGNITION ON POWER / KEY NOT WORKING DIAGNOSIS AND FIX!
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MERCEDES NO START / NO IGNITION ON POWER / KEY NOT WORKING DIAGNOSIS AND FIX!

Diagnosing Mercedes Benz ML350 Air Conditioning (W164)
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Diagnosing Mercedes Benz ML350 Air Conditioning (W164)

This Nissan has a GHOST...Battery DRAINS and Locks go NUTS in the RAIN? ('09 Murano V6)
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This Nissan has a GHOST...Battery DRAINS and Locks go NUTS in the RAIN? ('09 Murano V6)

Once You Understand it, You Will Think Everything Else is Silly - Toyota E-CVT
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Once You Understand it, You Will Think Everything Else is Silly - Toyota E-CVT

2011 Mercedes Benz ML350 3.5 272 A/C not working, not blowing cold air, a/c compressor damaged
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2011 Mercedes Benz ML350 3.5 272 A/C not working, not blowing cold air, a/c compressor damaged

A small part causing a huge issue: A/C control solenoid valve.
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A small part causing a huge issue: A/C control solenoid valve.

The most thorough explanation of Mercedes-Benz Airmatic air suspension
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The most thorough explanation of Mercedes-Benz Airmatic air suspension

2010 Mercedes GL450 Review - Proof You Can Get EVERYTHING In A Car For Less Than £20,000?
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2010 Mercedes GL450 Review - Proof You Can Get EVERYTHING In A Car For Less Than £20,000?

Mercedes A/C compressor (7SEU17C) weak points and tear down.
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Mercedes A/C compressor (7SEU17C) weak points and tear down.

Crank no-start: Mercedes E320 - Part 1 (Diagnosis)
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Crank no-start: Mercedes E320 - Part 1 (Diagnosis)

AC not working!!! The CAR WIZARD shows how to easily isolate the problem
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AC not working!!! The CAR WIZARD shows how to easily isolate the problem

The hidden power of a car's alternator that nobody knows about! You'll be shocked
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The hidden power of a car's alternator that nobody knows about! You'll be shocked

17 “Illegal” Tricks That Instantly Make Your Car Run Better
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17 “Illegal” Tricks That Instantly Make Your Car Run Better

Mercedes Benz A/C Not Cold!  Watch Out For This Hose!
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Mercedes Benz A/C Not Cold! Watch Out For This Hose!