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Small update: turns out the headrest motors had been disconnected (I presume on account of their screens). That and the broken switches are fixed. Still waiting for the new tires to arrive so I can test the car on the road and see if my fuel system fixes are working.
Replaced the wiper motor and everything related now works perfectly. Success!
Unfortunately the top part of the fuel pump assembly is heavily leaking fuel, so I need to replace the entire pump assembly.
Fuel pump has been replaced, it seems I need to bodge a hybrid hose setup as my in-tank lines are simply 8mm ID hoses, the pumps need a clip-on SAE fitting.
I also discovered that I need to do some suspension work. I'll start with the front thrust arms and ball joints, and then replace both rear shocks--they are leaking heavily. Not easy to find replacements!
A longer-term project will be to replace the head unit with an Android one as well.
Cold start whine is the oil pump. It's a permanent feature.
Just to jump in here....Working on fixing that issue on the next freshen up this winter and will let you guys know if it works. Tired of the whine for sure.
Just to jump in here....Working on fixing that issue on the next freshen up this winter and will let you guys know if it works. Tired of the whine for sure.
I'd be very curious to see what you come up with! It's very annoying.
I had the scavenge side pump gears treated by a company called WPC on my spare oil pump. It will essentially make the gears very slippery and hopefully reduce the cavitaion type noise that comes from the straight cut gears.
I could have installed the XF Motorsport aluminum gears but do not trust them for racing.
I've been really struggling with the fuel system again. I replaced the pump assembly (works great) but the hoses leading from each pump to the y-junction keep breaking, thus disabling the car. It appears to just be rubber hose (I'm hoping submersible). Is that how it should be?
Plastic, not rubber, hoses and the hoses are semi-permanently attached to the fuel filter/ fuel pressure regulator. Replace everything at the same time. Expensive and painful? Yes. Necessary? Yes.
Plastic, not rubber, hoses and the hoses are semi-permanently attached to the fuel filter/ fuel pressure regulator. Replace everything at the same time. Expensive and painful? Yes. Necessary? Yes.
Hang in there...
That makes more sense. It might explain why my fuel gauge always reads half-full irrespective of actual fuel quantity!
Thank you...I've put it on the back burner with a R129 purchase taking all the attention this week.
That makes more sense. It might explain why my fuel gauge always reads half-full irrespective of actual fuel quantity!
Thank you...I've put it on the back burner with a R129 purchase taking all the attention this week.
I went through the exact thing with my wagan from Japan. You're staring down a 2500 bill to fix it properly. These cars are not American cars where you can tinker in the backyard and fix complicated systems like this on your own. You need to be able to access the parts catalog readily. Being it having a JDM vin will throw your local Mercedes dealership for a loop.
I went through the exact thing with my wagan from Japan. You're staring down a 2500 bill to fix it properly. These cars are not American cars where you can tinker in the backyard and fix complicated systems like this on your own. You need to be able to access the parts catalog readily. Being it having a JDM vin will throw your local Mercedes dealership for a loop.
R.K.
I don't think it'll be quite that much, luckily (the sender unit is about 500usd, and I've already replaced the pump unit). I'm actually enjoying how relatively simple it is relative to my BMWs, although the parts catalogues are not quite as intuitive!
Lots of progress this weekend! I replaced both front thrust arms, the upper and lower ball joints on the driver's side (I received defective parts so couldn't do the passenger side)--that turned into a massive undertaking!
Also did the rear shocks. I'm looking forward to going for a drive!
I've been away a bit, but I have added 500kms to the car since the shock job. The ride is so much better now!
A strange issue has come up now that the weather is cold: the brake pedal pulses for a couple of seconds quite regularly (once when I start the car, and maybe every 10 mins after that). No warnings on the dash (yet), but I'm concerned that it may be an SBC issue? The car has low mileage (78k kms) so it would seem strange for that to come up so soon...
I've been away a bit, but I have added 500kms to the car since the shock job. The ride is so much better now!
A strange issue has come up now that the weather is cold: the brake pedal pulses for a couple of seconds quite regularly (once when I start the car, and maybe every 10 mins after that). No warnings on the dash (yet), but I'm concerned that it may be an SBC issue? The car has low mileage (78k kms) so it would seem strange for that to come up so soon...
LOL. My 97k km car just had the SBC fail on it catastrophically 6 weeks ago. It will definitely take years off your life when it does happen. Keep a clean pair of underwear in your car.
FWIW, I regularly run through the procedure in the event of total SBC failure...right foot hard on the brake pedal, left foot stomp the parking brake to the floor, then shift left foot to the main brake pedal, all the time using the left hand to cycle the downshift button on the steering wheel. Emergency SBC is only unassisted hydraulic pressure to the front brake calipers, nothing to the rear calipers. Know the system. Understand the system.
PACE. Primary plan (plenty of room, hard on the brake pedal, pull the car to the side of the road), Alternate plan (not so much room, hard on the brake pedal, downshift with steering wheel paddle, pull the car to the side of the road), Contingency plan (very little room, hard on the brakes, stomp parking brake, move left foot to main brake pedal and push like a gorilla, downshift with steering wheel paddle, evasive maneuvers as necessary, pull the car over to the side of the road), Emergency plan (look for anything that will cushion the crash...).
Never experienced a total SBC failure, never want to experience one. Emergency procedures exist for a reason.
Always think, "What if?". I sorta felt bad for the guy behind me when I stomped on my brakes when the box truck in front of me dropped its driveshaft which started pogoing down the highway with each bounce 6 feet in the air (hello, windshield!). I was on my Alternate plan that day. Maybe those years in the military taught me something....
@radride How do you like your Hellcat? Any observations you would like to share with us? Cool car, in my opinion.
Last edited by bbirdwell; Oct 21, 2024 at 04:06 PM.
Thanks all. It seems to have improved (as in become less frequent). I get the pulsation once on startup, and then only once or twice per hour of driving. I've been too busy getting the R129 back on the road so haven't bothered to get it hooked up to SDS. Most of my driving is highway, and I always stay in either the leftmost or rightmost lanes for exactly that reason.
I also found out all four of my wheels are bent, and one is cracked. Not happy.
The factory low pressure cast wheels suck. I cracked multiple of them over several years and finally went aftermarket. Ditch the factory wheels now; you'll be grateful later.
The factory low pressure cast wheels suck. I cracked multiple of them over several years and finally went aftermarket. Ditch the factory wheels now; you'll be grateful later.
These are CLS 19s. I was hoping they'd do better! I'll get these fixed for the time being, will look some more in the spring.
FWIW, I regularly run through the procedure in the event of total SBC failure...right foot hard on the brake pedal, left foot stomp the parking brake to the floor, then shift left foot to the main brake pedal, all the time using the left hand to cycle the downshift button on the steering wheel. Emergency SBC is only unassisted hydraulic pressure to the front brake calipers, nothing to the rear calipers. Know the system. Understand the system.
PACE. Primary plan (plenty of room, hard on the brake pedal, pull the car to the side of the road), Alternate plan (not so much room, hard on the brake pedal, downshift with steering wheel paddle, pull the car to the side of the road), Contingency plan (very little room, hard on the brakes, stomp parking brake, move left foot to main brake pedal and push like a gorilla, downshift with steering wheel paddle, evasive maneuvers as necessary, pull the car over to the side of the road), Emergency plan (look for anything that will cushion the crash...).
Never experienced a total SBC failure, never want to experience one. Emergency procedures exist for a reason.
Always think, "What if?". I sorta felt bad for the guy behind me when I stomped on my brakes when the box truck in front of me dropped its driveshaft which started pogoing down the highway with each bounce 6 feet in the air (hello, windshield!). I was on my Alternate plan that day. Maybe those years in the military taught me something....
@radride How do you like your Hellcat? Any observations you would like to share with us? Cool car, in my opinion.
I've had my Hellcat for coming up 10 years. The car is absolutely insane stock. Mine is modified and makes around 840rwhp through a 6 speed manual. The Hellcat should be called the widow maker becuase it will kill you in a second. That much power and torque is crazy. Keep in mind, I had a CL65 in the past which is power and fast but the hellcat makes it look and feel slow. The Hellcats are also retaining their value a lot better than AMG's of that same year. My car is still worth 55K USD which is close to 70K Cad. MSRP in 2015 was 73K CAD. I keep my car in mint condition with 20000km on it. Never winter driven. As a matter of fact, its already parked for the winter. Here is a pic of it for reference:
There is/ was a local guy to us here in the GTA XF engineering or something on YT. He made a set of gears that were a different cut. Eliminated the whine, but the final installation was abit sketch. I don't think he ever finalized it.
Love the thread btw, also a s211 wagon owner imported from Japan. I've been dumping in $$ to get mine sorted also lol.
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren
Slideshow: A one-of-one U.S.-spec Mercedes-Benz SLR McLaren Roadster became even rarer after a factory-backed transformation at McLaren's headquarters.
