Good afternoon, 2001 ML55 Owner (recent) - Question for the wise!
The vehicle has 153,xxx miles, still runs good, shifts like a dream. I spent 4100.xx so far replacing and fixing:
- New Alternator (454.48)
- New Water Pump (208.11)
- New Steering Pump (396.30)
- AC Compressor /w Clutch (673.73)
- Belt Tensioner Assembly (252.05)
- New Idler Pulley (88.62)
- Serpentine Belt (77.97)
- Outer Tie Rods (83.94)
- Front Crankshaft Seal (37.96)
Additionally I had a full synthetic oil change and fuel system cleaned. The previous owner had coil pack(s), plugs/wires replaced a few years ago, so still good on that. My question is, even after the AC Compressor & Clutch replaced (new) and AC charged, the AC does not blow cold and seems like the compressor is not engaging. I am taking it back to the shop on Monday to let them run it down further but is there something that is a no-brainer from your guys experience on what it could be? They have checked the main fusebox/relay, doesn't seem to be that. Is there a sensor somewhere or control module we are missing? Thanks for your time and any help. Cheers
The vehicle has 153,xxx miles, still runs good, shifts like a dream. I spent 4100.xx so far replacing and fixing:
- New Alternator (454.48)
- New Water Pump (208.11)
- New Steering Pump (396.30)
- AC Compressor /w Clutch (673.73)
- Belt Tensioner Assembly (252.05)
- New Idler Pulley (88.62)
- Serpentine Belt (77.97)
- Outer Tie Rods (83.94)
- Front Crankshaft Seal (37.96)
Additionally I had a full synthetic oil change and fuel system cleaned. The previous owner had coil pack(s), plugs/wires replaced a few years ago, so still good on that. My question is, even after the AC Compressor & Clutch replaced (new) and AC charged, the AC does not blow cold and seems like the compressor is not engaging. I am taking it back to the shop on Monday to let them run it down further but is there something that is a no-brainer from your guys experience on what it could be? They have checked the main fusebox/relay, doesn't seem to be that. Is there a sensor somewhere or control module we are missing? Thanks for your time and any help. Cheers
If you are determined to spend money, take it to a reputable MB dealer and have them run a top to bottom examination on the ML and they will give you a copy on issues they found. Some pictures would be nice for the group......Oh, and enjoy your ML, they are pretty amazing vehicles !!






