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2015 SL400 (M276 Turbo), 2014 C350 Sport (M276 NA), 2004 SL500 (M113), 2004 Audi TT225 (BEA)
B252E98 Hydraulic Pump Overtemperature
I intermittently get DTC B252E98 under the control module VDS - Vario Roof control (N52). The pump is located next to the battery in the trunk. XENTRY (simulation) says to check for loose or corroded wires. I will try that once it warms up outside a bit. It is 17°F at the moment. 🥶
Can’t really tell from the pics but connections to the pump motor look a little oxidized. May be worth cleaning them with electronic cleaner and small wire brush…
Thought there was a “plug” (connector) for those connections to the pump motor, I’ll check mine when I can to compare.
Good Luck
Last edited by crconsulting; Jan 9, 2025 at 09:44 AM.
2015 SL400 (M276 Turbo), 2014 C350 Sport (M276 NA), 2004 SL500 (M113), 2004 Audi TT225 (BEA)
Actually, I've not had any problems with the roof opening or closing, it's just that this code pops up intermittently when I do a full scan of the car. I will say that I first detected it last summer but dismissed it as one of those flukey things our cars do.
Actually, I've not had any problems with the roof opening or closing, it's just that this code pops up intermittently when I do a full scan of the car. I will say that I first detected it last summer but dismissed it as one of those flukey things our cars do.
Are you getting the error in both XENTRY and LAUNCH Creader?
on aside note, I purchased one ( LAUNCH) to try out and compare to XENTRY.
As you have suggested, It’s pretty decent and a good alternative for folks here who don’t want the setup complexity of XENTRY.
Also looks like some versions of XENTRY may be missing some vital portions of the diagnostic functionality.
2015 SL400 (M276 Turbo), 2014 C350 Sport (M276 NA), 2004 SL500 (M113), 2004 Audi TT225 (BEA)
I was using LAUNCH and cleared the code. It was stored, not current. Next time I will wait and scan it with XENTRY if it shows up. Very good observation because sometimes aftermarket scanners pick up codes that are ignored by XENTRY. On my C-Class, there is a persistent code associated with traction control (ESP) that is ignored by XENTRY.
Also, I went and checked my electrical connections to the pump motor and they look brand new, much better than the picture above from XENTRY.
I was using LAUNCH and cleared the code. It was stored, not current. Next time I will wait and scan it with XENTRY if it shows up. Very good observation because sometimes aftermarket scanners pick up codes that are ignored by XENTRY. On my C-Class, there is a persistent code associated with traction control (ESP) that is ignored by XENTRY.
That is interesting, I'm thinking it's the other way around. The LAUNCH Creader is generating false codes. But will scan cars with both, to try to see if I can duplicate on my end.
Also, I suspect different XENTRY installation's may be missing some functionality depending on how they were installed
Originally Posted by JettaRed
Also, I went and checked my electrical connections to the pump motor and they look brand new, much better than the picture above from XENTRY.
That's (kinda) good news
Last edited by crconsulting; Jan 9, 2025 at 12:20 PM.
Interesting, I think @S-Prihadi and others touched on the subject that different aftermarket scanners may be generating or picking up different codes.
I scanned my car with the LAUNCH, which scans clean in XENTRY. It is Generating a bunch of codes which have never shown up in XENTRY.
So the question is does XENTRY have a “tolerance” of which codes it is generating, as some of the other scanners may be too sensitive, therefore not reporting on false codes, or is it just missing these errors? I believe XENTRY is accurate, but it may also depend on individual installations…
I have a legit parking sensor and drivers door mirror heater code, but the rest are unrecognized.
I figured it was too good to be true for OEM equivalent new parts. These damn German cars get expensive to maintain. After 13 BMWs, 2 Audis and now my first Benz I'm seriously thinking about taking my wife's advice and move to Lexus. She's on her 3rd RX with almost zero repair costs, just routine maintenance.
2015 SL400 (M276 Turbo), 2014 C350 Sport (M276 NA), 2004 SL500 (M113), 2004 Audi TT225 (BEA)
Originally Posted by rmorin49
I figured it was too good to be true for OEM equivalent new parts. These damn German cars get expensive to maintain. After 13 BMWs, 2 Audis and now my first Benz I'm seriously thinking about taking my wife's advice and move to Lexus. She's on her 3rd RX with almost zero repair costs, just routine maintenance.
But, it's a Toyota. Don't get me wrong, they are great cars. My daughter's 2010 RX350 with nearly 220,000 miles for the first time left her stranded when the "Steering Lock Active" message came on and the car wouldn't start. Fortunately, she was about 5 minutes away from me.
The problem is that the closet Lexus dealer is in Rockville and they quoted $600 to diagnose the problem. WTF, over? This wasn't some vague noise or squirrelly shift problem; this was a definitive message from the ECU (or whatever controller monitors these things). Open the fricken lookup manual and tell me the problem. I went online to JustAnswers.com and the Lexus expert diagnosed (recognized) the problem right away that it was a faulty steering lock actuator that needed replacing. Because the new actuator would need to be programmed for the car, you are kinda stuck going to the dealer. I estimated it would run $1000 to $1500 to repair. She found a nice 2022 Toyota Camry and ditched the SUV.
The point is, the car had been great for 15 years and 218,275 miles. The dealer was slimy.
Regardless, I own cars I love to drive. Maybe not the cheapest or most reliable, but certainly the best to drive.
I figured it was too good to be true for OEM equivalent new parts. These damn German cars get expensive to maintain. After 13 BMWs, 2 Audis and now my first Benz I'm seriously thinking about taking my wife's advice and move to Lexus. She's on her 3rd RX with almost zero repair costs, just routine maintenance.
That is why I keep a low mileage LS 460....besides being a great car to drive !
Yup,
So, @JettaRed, if you haven’t figured it out yet, CREADER is reading “ghost codes”
Codes that were triggered on previous repairs, and cleared with XENTRY.
But for some reason LAUNCH CREADER is still recording these codes.
Your overheating pump code was from when you had a leak in your trunk/vario roof hydraulic system as that would have caused the pump to overheat and trigger the code you currently see.
Also, I am unable to clear these ghost codes with CREADER. They continue to come back.
I checked several cars I know the repair history on and confirmed these results.
I guess this tool is great if you want to see your cars repair history, but I would be careful using this tool to diagnose any REAL issues pertaining to repairs. It would be difficult to determine if they are ghost codes or real.
All the codes above on my car were also from previous repairs, except for the current parking sensor and mirror which it did show.
I would also be careful on how this tool writes code back to your car thu any mods it may do.
Good Luck!
Last edited by crconsulting; Jan 10, 2025 at 11:38 AM.
2015 SL400 (M276 Turbo), 2014 C350 Sport (M276 NA), 2004 SL500 (M113), 2004 Audi TT225 (BEA)
Wow! That is very interesting and good to know. I can imagine how that could negatively influence an interaction with the dealership or an independent shop. They say there is no fault and I say there is, and all of a sudden we have a pissing contest.
So, the next time I get that code, I will check it with XENTRY to see if it is there. Even if it is, I will clear it with XENTRY to see if it comes back.
I do have problems with the trunk opening and closing when it is really cold out. I ordered new trunk struts which should be here tomorrow.
I do have problems with the trunk opening and closing when it is really cold out. I ordered new trunk struts which should be here tomorrow.
Keep us posted...
At this point, this is my working theory on the codes generated by Creader Elite but am open to suggestions. I could be wrong, but this is what is happening to the cars I scanned and know the repair history on. Sounds pretty cold right now over there and those gas struts always have issues in cold temps, so the extra force could be generating the B252E98 code.
I was hoping this would finally be a good alternative to the setup complexity of XENTRY. Especially for the owner's who simply want to check their cars. Bummer....
I will reach out to LAUNCH if this behavior is consistent and not just user error, see what they say.
If you know your cars history and progressively archive new codes as they appear, or if you want to see the cars repair history, It may be of value. But as a diagnostic tool to an unfamiliar car, it could be troublesome.
When comparing software/hardware. its important to note software revisions along with hardware.
FYI: Using CREADER ELITE LAUNCH 2.0 - Mercedes Diagnostic Software 50.36
Stay Warm!
Last edited by crconsulting; Jan 10, 2025 at 02:03 PM.
2015 SL400 (M276 Turbo), 2014 C350 Sport (M276 NA), 2004 SL500 (M113), 2004 Audi TT225 (BEA)
LAUNCH Creader is great as a portable scanner that fits nicely in the car. It can also do stuff like initiate the radar calibration sequence. But for serious problems, I use XENTRY.
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