Glen55

With 5600 miles, my CLS 55 appears to have lost substantial power. At speed, it won't kick down when accelerating. It is not possible to have wheel spin from a standing start (with ESP off). I would estimate a 0-60 time of ~9 seconds. Has anyone else experienced such a problem? The car goes in the shop early next week.



Glen

20C4S

was the car overheating?

idrive

check the fuel...

VelocitE55

Your supercharger might not be engaging. The supercharger is engaged by an electro-magnetic clutch and as another member suggested, you may be having a heat issue which would cause the system to prevent S/C engagement. If the system gets too hot and the S/C cant engage, its essentially like driving a normally aspirated V8 with a big piece of equipment (S/C) blocking airflow so it would be especially slow.

Glen55

Thanks for the thoughts. I also believe that the supercharger is not engaging. Not sure about the heat thing as the issue occurs at start-up with a cold engine (not that I mash the pedal with a cold engine). Hopefully, it is a quick and permanent fix.

Glen

Glen55

As for the gas suggestion ("check the gas"), it must be good gas - I paid $3.40 per gallon!!

Jakpro1

If it happens suddenly, then car goes back to normal fewmins later, then welcome to the E55 club. Noone really sure what the heck is happening when it does that. Bunch of guesses. Some say heat soak, so ECU is shutting down supercharger due to high heat (regardless of what dash is reading).
Some say ECU can shut down supercharger if it feels driving has become erratic and is jolted a certain way (think that is bunk though).

If it is constant and does not go back to normal, usually a sensor. All these sensors have to play nice or the whole system gets out of whack. Most likely will pop in a new one somewhere and you'll be up and smoking.

idrive

I do agree with the supercharger issue, Butt... Beware... I just settled with the Insurance company for the replacement of 10, Ford V10's
They had a tanker driver (idiot) top off their underground tanks (where we fill) with 10-40 motor oil. Loss of power was our first immediate issue. As the oil did not combust it was forced past the rings and into the crank. As the crank filled, the motors would start to smoke and sputter, limp in. We were draining 16 quarts of oil out! Holds 7 tops.

Good gas is a wonderful thing. But it is not hard to get shbaditty gas as well.

And as an after thought you might have a plugged fuel filter...as a result of shbaditty gas

Grumpy666

Don't forget the infamous IC pump problem.

csumt76

Yep... personally I have never seen an issue with the magnetic clutch not operating, only on a European car that an independent shop attempted to convert to U.S. spec. If in fact you have a problem, I would blame the intercooler circuit. If it is not functioning, the kompressor will not engage due to the increased IAT's to save the engine/prevent detonation.

Glen55

All is well again - the supercharger is doing its thing. The service department ran diagnostics and found two fault errors - Code P2006-008 (Fuel Pressure Sensor) and Code P2075-002 (Charcoal Canister Valve). They performed tests on both and found no problems. After resetting the diagnostics, the supercharger worked fine. Apparently, whenever certain fault errors are detected, the computer shuts down the turbocharger.

Now it's a wait and see game. Was this an isolated incident or will the fault errors continue to occur? Stay tuned.

Glen

idrive

Fuel pressure sensor??

Change the fuel filter!!!

csumt76

Those two codes are related to the EVAP purge system and it is an emission component just designed to detect leaks in the fuel system to prevent unburned HC's from entering the atmosphere. They shouldn't effect the supercharger, none of the emission equipment will be utilized under WOT driving. Those codes come up every now and then, but most of the time they pass the leak test.

mrankovic

Sure you haven't got an e-vo-sport pulley and it's shredded the supercharger belt