Background on car

Bought car with 97k miles in May 2019 and put about 21k miles on it before tuning. Crazy,local hard driving too. I wanted to make sure everything was solid on the car before modifying which is why it took so long before I actually tuned.


I had my engine and trans mounts changed at around 115k only because it was recommended after my first service b at 100k other than that tech said car is super solid. I one other issue with car but that was a command issue which was fixed and a super pain but nonetheless it was fixed. Absolutely nothing engine wise . Then normal routine maintenance oil changes and brake rotors and pads changed.

Mods

Weistec Stage 2 ECU tune
Weistec Asv and charge pipes
Weistec Filters
VRP cold air intake
Custom 3 inch downpipes straight until stock mufflers

Had asv and charge pipes , Filters, and intake installed first and no issues with that. The charge pipes were tough to get in because it’s so tight up there in the front, either way all that was pretty smooth and then I wanted to do downpipes before I tuned.

The downpipes were installed but there was a leak in the exhaust where the fabricator had to add rest of pipe and was causing a ton of drivability issues Multiple CEL for faulty o2 and lean CEL and eventually random misfire. I was trying to figure out what the issue was and didn’t think a leak in exhaust was causing it but sure enough I took the car to Jerrysmb in Oviedo, Fl to have new spark plugs Installed and what I think is really cool is I asked them if they could replace all o2 sensors and coil packs and they said no no no, just seal up the exhaust first. They could of got me for an easy 1000 or so and didn’t so I really respect that, and they have a lifetime customer. Anyway fixed exhaust and all CELs gone after about 20 miles after exhaust was sealed. Now it was time to install the tune.

I went with Weistec because of someone I met with Weistec supercharger in his 2009 c63 and he had nothing but great things to say about them and the car is awesome on every level imo. I decided to go with Weistec and couldn’t be happier with them. Every issue I had with the car , they were with me the entire time and super fast and super helpful. I don’t think I waited more than 10 minutes between responses by email. I’m a business owner with 4 kids and since covid I’ve had to really pick up a lot of the slack at the office, and do not have much time to drive to other spots or really wait around. It was easy enough for me to do on break or in my garage at home. I paid for the cypher handheld and everything is so easy. I can change from tune to stock in 10 minutes. This is the first car I’ve ever had worth modifying and I’ve never done anything to my cars in the past no rims or anything.

Other than a few little issues here and there , I can totally say this was worth it ! I loved the car before and now I love it even more. I can’t stop thinking about driving lol it’s been raining like crazy so I have had to be easy. But it’s running so awesome and I’m really surprised at the everyday drivability of it. Doesn’t feel choppy, shifts very smooth, but when you let loose on it it’s hard to keep the tires from spinning..... all the way up to 60 mph if you punch it they’ll spin while coasting at 60. It’s unbelievable the freaky pulling power it’s got. I have too much fun with the challengers and 392s they can’t believe it’s a 4 door mercedes that’s smoking their doors off. I know I need more power though if I come up on a hellcat or demon so we will see what’s up for the next level in the spring. In the meantime I’m going to enjoy the added power, sound, and overall drive of the vehicle. I can’t wait to get on dyno and track hopefully in the next week or two and hopefully I can get both done at same time. After that I’m going in for next stage with a major turbo upgrade and more. I def want to thank everyone for all their help on this project and giving me the confidence to do something I had no confidence in doing. So big thanks to the forum, very grateful ! Will update with numbers soon.

 

Hi! Nice looking car. Good to hear that car is running strong after those frustrated problems you have. Must be good feeling now. My suggestion is go and buy a Dragy! Its nice to see what car is capable to run on compare to other cars on Dragy times on "inside" Dragy leader board and on forums also.

 

Thank you and yes was a definitely a little frustrating but well worth the wait and I saw dragy somewhere can’t remember but yeah I’ll look into that.

 

Btw. Is your IC coolant reservoir low, or just looks like it? Maybe the liquid there is just that colour that can't be seen good on that picture.

 

Hey dblok.

I'm in Avalon east Orlando, what is the name of the shop in Oviedo?

I just got new wheels, lowering module and amg calipers are getting refinished. Then I'll plan on doing some mods on the engine. Did that shop install all of the mods?

 

Those are my old stomping grounds over there Waterford/ucf and one of my best friends lives out in Avalon there with a gold m3. We should go hit the track sometime, I’ve never been and we want to hit the speedway.

The name of the shop is Jerry’s MB service 551 S Econ Cir, Oviedo, FL 32765. Now I want to say none of this was inexpensive lol but what I am saying is that they charge a much lower rate than the dealer and they are honest and when I first went there I asked them tuning questions and they were more than willing to not only answer questions, they were willing to help me get the car where I want It to be. They even got a guy in the back that worked for renntech for some time. They are very knowledgeable. They did my engine and trans mounts, servicing, and they installed my Ngk plugs. When my command unit broke and I was told by a guy at the dealer to just “buy one off eBay and we will program it for you” .....well when I did buy one off eBay and went back to dealer and I asked the same guy, he looked at it for a few minutes and came back told me he couldn’t program it ???? After he told me to buy one off eBay, I was pissed. Called a few other dealers as well and they said they couldn’t do it. So I called Jerry’s told him my situation, he told me they couldn’t program it but he l knew a tech at lake Mary location and told me to call him. So I called him and setup an appointment and dude got my command unit programmed for 200 bucks(overall cost 500) beats dealer cost of 5k lol . All in all, that shop has done me solid and I would always call them and ask them if they can or can’t do something and how much they charge. Only reason I went to the dealer for the command is because Jerry’s is far from me. Turns out should of went there from Beginning. They are also helping me with the airmatic issue.

I had my buddies from the fabricator shop do the downpipes and asv and charge pipes. They have a little shop in winter park/Orlando area and got the connect for the dyno at titan motorsports.

 

Nice im jealous, where did you get the asv weistec website?Have you thought about bovs?
Also where did you get your rear diffuser?

 

Got the filters, chargepipes and asv and tune all from Weistec site. As far as the bov, that’s what the anti surge valve is for. The diffuser is maxton and it’s just a piece that you can bolt on but you gotta have your own hardware which is a couple dollars at Home Depot .
https://maxtondesign.ca/collections/...-rear-diffuser
this is the exact piece but I ordered mine from eBay it came from Germany I believe, and took forever to get to me and took forever for to put on lol and i broke it already smh . I think I’m going to do an amg style rear diffuser with some new rear pipes.

 

yes it was low, you gotta good eye, lol. I had a leak out of the reserve tank which was replaced pretty much same time as the photo was taken.

 

Do you run with ESP off to break wheels? My traction control will literally cut power if it thinks I'm about to spin. I have to launch and use power slowly.

 

I had an issue everytime I went to do a launch, I’d get this Message on my dash, actually got this Same message when shifting aggressively like 2 other times in traffic and car goes into limp mode even threw a CEL for turbo under boost on the third failed launch attempt? Weird I’ve never had that CEL before but also never attempted to launch with esp off 3 consecutive times, failing at each attempt either.



I sent Weistec an email that night with a description of what happened that evening and they sent me a new file In the morning and I’ve tried to launch a few times and so far so good. Ive got a video but I’m still learning how to launch but so far have not had that come on at all while driving or trying to launch. Here’s one pull but I’m definitely still trying to learn how to launch effectively.

 

There is really not so much to do on launch, because TCU is limiting power in 1-2 gears, maybe some on 3 gear also.( Closing throttle blade, limiting boost etc.) Maybe like 0,2-0,3s off 1/4 mile time and 0-60mph time. Buy a TCU tune and let us know how good it will work on our M278 platform.

 

weistec said they are working on one should be out soon.... can’t wait 😊

 

Nice! hope Weistec knows the system...There are only a few people in the world that can do the TCU tune our and M157 platform. That was the situation a while ago. If u haven't read about the TCU tune, there are a few really great threads and very valuable information on W212 forum! I recommend that to you. My tuner in Finland is working on that TCU tune also. But if he could not do it before next summer then I have to buy the eurocharged TCU dongle. https://www.facebook.com/eurochargedperformance/

 

Common problem with mercedes platform. If they lower the torque, you might not have as much issues. It will always be a factor with the tune tho. The tcu tune is finally available, I'm about to pull the trigger myself. Even on drag radials in dyno mode or just esp off, I can't boost of the line.. power is limited until end of 2nd gear. You can however feather the throttle out the hole, but that's a whole different story and never consistent. Roll race using paddle shifters in correct rpm band i've taken down many higher hp cars. From a dig I'm always playing catch up. Wish i bought a awd, lol

 

down low with wheelspin. But i have issues at higher speed too.

i get hit hard in 5th gear too. WOT several have said it is hitting the torque limiter, just cuts off all power transfer hard. I guess I’m going to go with EC tcu tune. I need to ask if they warranty the tranny if you do that.

Anyone have any plans (southern hot rod) or to rebuild the tranny or use the weistec style pan?

 

I’m going to ask weistec about the tcu tune here soon and I’m also going to be driving a lot less miles on it here soon as I’m getting a daily this week. I’m nervous about the transmission especially I’m over 120k miles on it now. Probably going to do the renntech transmission upgrade when I upgrade the inter cooler and add the weistec meth injection in spring time, The launch is rough lol but I still **** off a lot of c8s and 392s around town. I wish I got 4matic sometimes lol but I’m so happy Right now



im going to be doing the renntech trans upgrade here soon

when I’m driving at WOT my car flies like a freight train, 60-130 is freakish and I have to say since adding the thicker Michelin tires, my grip has been phenomenal and a whole lot less wheel spin even at higher speeds. I’m absolutely loving every second I get to spend in the car especially with the tune, catless dps, asv. The sound, the feel, the ability to go from all out animal and turn back to a reserved luxury vehicle amazes me........ I need more power though lol

 

I’ve been reading/writing about southern hot rod for transmission upgrade: http://tunedmercedes.com/tuners/meet...uthern-hotrod/

 

that looks awesome !!!!