X218 CLS250 No Power

[renrutp76]

Hi,

I have a major issue that hopefully will ned up being a minor issue. I drove home form Oxford yesterday evening approx. 140 miles. I stopped off at a services on the way back, before this point all was well. I started the car and exited the services onto the slip road, and there was no pull at all!!! I eventually reached about 60-70mph, the car shifted manually but had an odd pattern whereby it shifted at exactly 2800 rpm which is unusual. eco or sport made no difference, but the selector would no longer give me a manual option, and the paddle shift didn't work either. I limped home, left the car overnight and had a code read session this morning, the results were all current and stored: -

P05DB11 The Actuation valve of the oil pump in the combustion engine has a short to ground
P004711 The Boost Pressure Control Flap has a short to ground
P024511 The output for the low pressure turbocharger has a short to ground
P260211 The output for the circulation pump coolant has a short to ground
P1C4911 The valve for piston cooling has a short to ground
B21BE11 Actuation of the radiator shutters has a short to ground
P0C1E11 Check component Y58/13 heat exchanger shut off valve has a short to ground

Clearly there is a short to ground somewhere! I have an automation business so am familiar with the terminology and principle of how the ECU inputs and outputs work, but I don't know where half of these rascals are in the engine bay to start unplugging to test. Has anyone any ideas? I appreciate that the ECU may itself have failed, although the canbus is OK.....

Book in for a service on Monday so hope to have it sorted by then (at least diagnosed!

Thanks in advance.....

 

[ajlsl600]

Get it on Mercedes star indy or dealer. The issue should become clear. I think it went into limp mode, a number of causes for that.

 

[renrutp76]

That's where the codes came from, the fact that the error is current and stored means that it can't be reset, the fault is still present......

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[ajlsl600]

Right... Star should list where components are fitted on yr motor I see it says check component y58/13 find that and start there. Maybe other faults share an input/signal from that.

 

[renrutp76]

Right... Star should list where components are fitted on yr motor I see it says check component y58/13 find that and start there. Maybe other faults share an input/signal from that.

Good starter point. All of the listed components will share a common power supply, if 1 component grounds it, the rest fault......

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[renrutp76]

Car went to MB dealer after 3 week wait. Diagnosed as damaged wire in engine bay loom. Picked up as service dept was closing on Saturday, fault was rectifies in the 1hr diagnosis so no extra charge. Got 10 mins from dealer then engine management light on and limp mode again . Put on star machine and it came up with a dpf emissions fault with a counter. Reset but fault re-occurred..... Anyone any ideas?

Thanks in advance

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