GLK-Class (X204) Produced 2008-2014

Car Lot GPS guy leaves two connectors left unconnected

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Old Jan 9, 2026 | 02:28 AM
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Glk 250 bluetec
Car Lot GPS guy leaves two connectors left unconnected

Can these two wires the car lot people left from their removed GPS cause sensor codes on a 2013 glk 250 bluetec?


Last edited by Samxprp; Jan 9, 2026 at 04:05 AM.
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Old Jan 9, 2026 | 01:28 PM
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OK, I'll bite. What are "car lot guys" and why are they removing a GPS from your car?

Those wires look like they might not be part of the OEM harness. Where do they go?

What codes are you seeing?
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Old Jan 9, 2026 | 01:51 PM
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2014 GLK350 base model (active) ; 2001 E320 base (retired); 2001 Wrangler soft-top
Originally Posted by John CC
OK, I'll bite. What are "car lot guys" and why are they removing a GPS from your car?
I'd say quite a few folks have no idea what the high-end dealers do.
They install GPS devices in EVERY vehicle so they can find them
quickly, instantly do inventory, and easily track vehicles that are stolen.

Just do an Internet search, if in doubt.

And there are a number of dealerships who will try to "sell"
that feature ... bad idea ... do you want to be tracked?
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Old Jan 9, 2026 | 01:56 PM
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Originally Posted by Samxprp
Can these two wires the car lot people left from their removed GPS cause sensor codes on a 2013 glk 250 bluetec?
That CAN'T be the work of a Mercedes dealership is it ??

Any codes?

I would have NEVER accepted the vehicle with that snipped wires ...
Did they show that to you? Or did you discover it on your own?
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Old Jan 9, 2026 | 03:52 PM
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I think they only attach a tracker when you have a loan on the car and they remove it once the car is paid off.
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Old Jan 9, 2026 | 05:55 PM
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Glk 250 bluetec
I found them on my own and went back to them and they removed the GPS but left those two wires crimped together. I paid for the glk 250 bluetec in cash, never had a loan.

I am getting codes p2080,p261f,c0031

If the wires are disconnected the car won't start, the wires have to be together to start.
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Old Jan 10, 2026 | 10:46 AM
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2014 GLK350 base model (active) ; 2001 E320 base (retired); 2001 Wrangler soft-top
Originally Posted by Samxprp
1) I found them on my own and went back to them and they removed the GPS but left those two wires crimped together.

I paid for the glk 250 bluetec in cash, never had a loan.

2) I am getting codes p2080,p261f,c0031

3) If the wires are disconnected the car won't start, the wires have to be together to start.
1) Did you read thru your invoice receipt to be sure they did not charge you for the GPS? (some dealers do that).

2) Codes ...
P2080 code means there's a fault with the EGT Sensor Circuit (Bank 1 Sensor 1) ... could be a bad sensor, wiring issues (corrosion, damage), or sometimes the PCM itself, which affects DPF regeneration and potentially reducing engine performance.

P261F code indicates a fault with the electric coolant pump, ... the pump is stuck or not responding as expected, leading to faulty engine warm-up and maybe the turbo boost because of coolant contamination in the vacuum system.

C0031 code is a fault in the left-front wheel-speed sensor circuit, often showing ABS, traction control, and cruise control warnings. Could be a bad sensor, damaged wiring/connector, or a problem with the ABS control module/fuse.

3) Do you mean they snipped the wires and twisted them together, as bare? There was no twist-cap insulator cover??
If this was a recent purchase, I'd be talking to the dealer about those three codes.

Was this a dealership used-car purchase? Or an independent car sales lot?
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Old Jan 10, 2026 | 10:47 AM
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P2080 means the ECM is seeing implausible readings from the EGT sensor.
P261f has something to do with the water pump.
C0031 says the left front wheel speed sensor isn't working. (Is the ABS light on?)

I doubt those wires have anything to do with the codes. Apparently their system had an immobilizer function. If you trace them back to their origin I suspect you'll find a wire they cut and tapped into.
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Old Jan 10, 2026 | 10:55 AM
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From: New Hampsha
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Originally Posted by calder-cay
coolant contamination in the vacuum system
[Fortunately,] That's an issue with the engine driven pump, not the electric one. It has a vacuum actuated bypass that is for faster warmup. If the seal fails coolant can migrate up the vacuum line and eventually into a wiring harness.

Last edited by John CC; Jan 10, 2026 at 11:49 AM.
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Old Jan 10, 2026 | 08:13 PM
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Glk 250 bluetec
Originally Posted by John CC
P2080 means the ECM is seeing implausible readings from the EGT sensor.
P261f has something to do with the water pump.
C0031 says the left front wheel speed sensor isn't working. (Is the ABS light on?)

I doubt those wires have anything to do with the codes. Apparently their system had an immobilizer function. If you trace them back to their origin I suspect you'll find a wire they cut and tapped into.
yes, the abs light is on, the only codes that are permanent and not secondary are c0031 and p2080.

Based on everyone's responses I am going to stop listening to chatgpt for electrical mechanic advice.
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Old Jan 10, 2026 | 08:15 PM
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Glk 250 bluetec
Originally Posted by John CC
OK, I'll bite. What are "car lot guys" and why are they removing a GPS from your car?

Those wires look like they might not be part of the OEM harness. Where do they go?

What codes are you seeing?
I paid for a car with cash and the guy was hired by the car lot to remove the GPS.

They're not but they belonged to a gps immobilizer and need to be connected for the car to start.
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Old Jan 10, 2026 | 08:16 PM
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Glk 250 bluetec
Originally Posted by calder-cay
1) Did you read thru your invoice receipt to be sure they did not charge you for the GPS? (some dealers do that).

2) Codes ...
P2080 code means there's a fault with the EGT Sensor Circuit (Bank 1 Sensor 1) ... could be a bad sensor, wiring issues (corrosion, damage), or sometimes the PCM itself, which affects DPF regeneration and potentially reducing engine performance.

P261F code indicates a fault with the electric coolant pump, ... the pump is stuck or not responding as expected, leading to faulty engine warm-up and maybe the turbo boost because of coolant contamination in the vacuum system.

C0031 code is a fault in the left-front wheel-speed sensor circuit, often showing ABS, traction control, and cruise control warnings. Could be a bad sensor, damaged wiring/connector, or a problem with the ABS control module/fuse.

3) Do you mean they snipped the wires and twisted them together, as bare? There was no twist-cap insulator cover??
If this was a recent purchase, I'd be talking to the dealer about those three codes.

Was this a dealership used-car purchase? Or an independent car sales lot?
yes, they literally just snipped the device off and crimped the wires together. They claimed the device was lefg from a dealer before them. I got a good deal so I didn't push it. I only asked because chatgpt was telling me that the wires were the problem but now I see chatgpt is full of s
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