{"product_id":"mercedes-ism-intelligent-servo-module-repair","title":"Mercedes-Benz 722.9 ISM Intelligent Servo Module Repair and Cloning Service","description":"\u003ch2\u003eMercedes stuck in park? Will not shift? Will not crank? This is the part that failed.\u003c\/h2\u003e\n\u003cp\u003eYour car does not need a tow truck and it does not need a dealer. Pull one module off the transmission, ship it to us, and we send back a new unit carrying your own VIN. Bolt it on and drive. You can do the removal in your driveway in about an hour.\u003c\/p\u003e\n\u003ch3\u003eHow this usually starts\u003c\/h3\u003e\n\u003cp\u003eIt almost never fails all at once. First a message shows up on the dash while you are driving, something like \u003cstrong\u003e\"Drive to workshop without changing gear\"\u003c\/strong\u003e or \u003cstrong\u003e\"Service Required Do Not Shift Gears.\"\u003c\/strong\u003e The car still drives. Most people finish the errand and figure they will deal with it later.\u003c\/p\u003e\n\u003cp\u003eThat message is the warning shot. It is the transmission telling you that once you shut it off, it may not be able to select a gear again.\u003c\/p\u003e\n\u003cp\u003eThe next morning the stalk does nothing. No click, no response, no gear change. The indicator in the cluster is blank or stuck on P. Turn the key and it may not even crank, because a Mercedes will not engage the starter until something confirms the transmission is actually in park. Nothing is confirming it, because the part that reports position is dead.\u003c\/p\u003e\n\u003cp\u003eThe car is now locked in place in your driveway. That is the Intelligent Servo Module, component \u003cstrong\u003eA80\u003c\/strong\u003e, and this page is about the two ways out.\u003c\/p\u003e\n\u003ch3\u003eDoes this sound like your car?\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eWhat you are seeing\u003c\/th\u003e\n\u003cth\u003eWhat is happening\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eStuck in park, will not shift into reverse or drive\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eThe ISM cannot move the shift lever inside the transmission, so the car holds Emergency P\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eShifter stalk does nothing, no click, no response\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eThere is no cable. The stalk only sends a signal. If the ISM is dead, nothing moves\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWill not crank, will not start\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eThe starter stays locked out until the ISM confirms park or neutral. No confirmation, no start\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e\"Drive to workshop without changing gear\"\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eThe ISM logged a fault and is warning you it may not shift again once you stop\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e\"Service Required Do Not Shift Gears\"\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSame failure, different wording depending on model year\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eGear indicator blank, or P R N D no longer highlights\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eThe cluster lost the position signal from the ISM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCar dropped itself into neutral while driving\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eThe ISM lost lever position and defaulted out of gear\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWas fine last night, locked in park this morning\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eClassic ISM. Low voltage overnight trips Emergency P and a worn module cannot recover\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCheap code reader shows nothing\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eGeneric scanners cannot see A80. A clean scan on a car locked in park is a clue, not an all clear\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eThis shows up on the E350, E550, C300, C350, ML350, ML550, GL450, GL550, S550, CL550, CLS550, R350, SL550, GLK350 and G550 among others. If it has the 722.9 seven speed and the stalk shifter on the column, it has an ISM and the ISM can fail.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFault codes that point here:\u003c\/strong\u003e 1994 (A80 cannot reach the specified target position), 1904 (internal mechanism in A80 not in the correct position), 1922 (system shut down due to an internal fault), 1974 (selector lever position implausible due to a fault in A80), 5399 (ESP CAN signal, gear selected, implausible), C103 ETC (no CAN message received from A80). Xentry will often just say \u003cstrong\u003eno communication with A80\u003c\/strong\u003e.\u003c\/p\u003e\n\u003ch3\u003eFrom here you have two choices\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003c\/th\u003e\n\u003cth\u003eCall a tow truck\u003c\/th\u003e\n\u003cth\u003eDo it yourself\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eGetting started\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eFlatbed with a winch and skates, because a car locked in park will not roll onto a wheel lift. $150 to $350 before anyone touches it.\u003c\/td\u003e\n\u003ctd\u003eOrder this service. \u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eThe part\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eYou are not allowed to buy it. Only a dealer can order you one. See below.\u003c\/td\u003e\n\u003ctd\u003eHandled. \u003cstrong\u003eWe supply the new ISM unit and put your own data on it.\u003c\/strong\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eThe work\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDealer labor, plus Xentry SCN coding, plus initial startup and lever adaptation.\u003c\/td\u003e\n\u003ctd\u003eOne hour on jack stands to pull the old module and bolt the new one on.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eYour car\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSits at the dealer for days while you arrange rides.\u003c\/td\u003e\n\u003ctd\u003eNever leaves your driveway.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWhat it costs\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e$1,150 to $2,000\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eThe price on this page, plus shipping your old module to us.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eHow it works\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003e1. You remove the ISM.\u003c\/strong\u003e It is bolted to the transmission and reached from underneath. On most models it is a splash shield, one electrical connector, and three bolts. Jack stands and basic hand tools, about an hour. Free step by step removal guides are on youcanic.com. If you would rather not crawl under it, any independent shop can pull it in well under an hour of labor, and they need no Mercedes specific tooling to do it.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e2. You ship it to us.\u003c\/strong\u003e Wrap the connector, drop the packing slip in the box, and send it to our office in Baltimore, Maryland.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e3. We read your data and clone it onto a new unit.\u003c\/strong\u003e This is the whole trick. Your original ISM holds your VIN, your DAS pairing and your adaptation data. We pull that data off it and write it onto a brand new module. What comes back to you is new hardware that your car believes is the module it has always had.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e4. It ships back in 3 to 5 days.\u003c\/strong\u003e Tested before it leaves.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e5. You bolt it on and it is over.\u003c\/strong\u003e Three bolts, one connector, splash shield back up. Turn the key and the car shifts. No dealer appointment, no coding software, no scan tool, no VSP paperwork, no tow bill.\u003c\/p\u003e\n\u003cp\u003eYour original module stays with us. You are getting new hardware in exchange, not your old unit patched up.\u003c\/p\u003e\n\u003ch3\u003eIf your old module is too far gone to read\u003c\/h3\u003e\n\u003cp\u003eOccasionally water intrusion or a burned trace takes the memory with it and there is nothing left to clone. You are still not stuck.\u003c\/p\u003e\n\u003cp\u003eWe ship you a new unit along with a \u003cstrong\u003eprogramming dongle\u003c\/strong\u003e. You install the new ISM on the car first, then plug the dongle into the OBD port. All you need on your end is an \u003cstrong\u003eAndroid phone\u003c\/strong\u003e. We connect remotely and program the module to your car ourselves, while it sits in your driveway.\u003c\/p\u003e\n\u003cp\u003eYou do not need a laptop, a scan tool, diagnostic software, or a Mercedes account. You need the phone and a few minutes.\u003c\/p\u003e\n\u003ch3\u003eWhy the dealer route runs close to $2,000\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eYour car cannot roll.\u003c\/strong\u003e Stuck in park means the output shaft is locked. It cannot be driven and it cannot be pushed onto a wheel lift. It takes a flatbed with a winch and skates or go-jacks. That is $150 to $350 before anyone has touched the car.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eYou are not allowed to buy the part.\u003c\/strong\u003e The ISM is a Mercedes \u003cstrong\u003eTheft Relevant Part\u003c\/strong\u003e. It cannot be sold to you, and it cannot be sold to your independent shop either. Ordering one requires a NASTF registered Vehicle Security Professional to submit a signed D-1 form, your title or registration, government photo ID for both you and the VSP, and a repair order carrying your VIN. That paperwork wall is the real reason people end up at the dealer. It is not the price of the part, it is that the dealer is the only door.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eThen it has to be coded.\u003c\/strong\u003e A dealer unit arrives blank. It has to be SCN coded online through Xentry, run through initial startup, and the selector lever has to be adapted. The aluminum mounting bolts are single use and cannot be reused.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat owners actually report paying:\u003c\/strong\u003e $1,000 on a 2014 W212. $1,520 on a 2011 E550 4MATIC. UK owners report over £1,000 for the same job. Add the flatbed and most people land between $1,150 and $2,000 by the time the car is back in their driveway.\u003c\/p\u003e\n\u003cp\u003eCloning your data onto a new unit skips every one of those steps. Your VIN is already on it before it ships.\u003c\/p\u003e\n\u003ch3\u003ePart numbers and fitment\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003ePart number\u003c\/th\u003e\n\u003cth\u003eCommon application\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eA0002701852\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eW164 ML, X164 GL, W166 GLE, X166 GLS, W204 C, W212 E, W221 S, C218 CLS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eA0002701752\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eW212 E, W221 S, W251 R, C218 CLS, C216 CL\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eA0002704452\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eW204 C, W205 C, W212 E, W221 S and later 722.9 variants\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eAlso stamped as 0002701852, 0002701752, 0002704452.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eChassis codes:\u003c\/strong\u003e roughly 2006 through 2018. C-Class W204 and W205. E-Class W211 late, W212, W207. CLS W219 and C218. CLK W209. S-Class W221. CL C216. ML W164 and W166. GL X164. GLS X166. GLE C292. GLK X204. R-Class W251. G-Class W463. SL R230. SLK R171 and R172. Gas, diesel, 4MATIC and AMG all use the same module.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCheck the label on top of your module before you order.\u003c\/strong\u003e The number is printed on the plastic housing next to the connector. If your number is not listed, send us a photo and we will tell you straight.\u003c\/p\u003e\n\u003ch3\u003eWhy these fail\u003c\/h3\u003e\n\u003cp\u003eWorn brushes and a burned commutator in the servo motor, which runs every single time you touch the stalk. Cracked solder joints on the board from years of heat cycling on top of a hot transmission. A shredded drive belt or stripped screw shaft, so the motor spins and the lever never moves, which is fault 1994 in one sentence. Position sensor drift, where the module still moves the lever but can no longer confirm where it landed. Or corroded pins and water intrusion, common on the ML and GL where the module sits right in the splash path.\u003c\/p\u003e\n\u003cp\u003eEvery one of those is worn out hardware. That is why the answer is a new unit carrying your data, not a patch on a module that has already given you everything it had.\u003c\/p\u003e\n\u003ch3\u003eQuestions we get\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eMy Mercedes will not come out of park. Is it always the ISM?\u003c\/strong\u003e\u003cbr\u003eNot always, but it is the first place to look. Rule out a weak battery and a blown fuse first. If voltage is good and the stalk still does nothing, it is the ISM. Always read the codes with a full system scanner like the YOUCANIC UCAN-II pro. \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMy Mercedes will not start and will not crank. Related?\u003c\/strong\u003e\u003cbr\u003eUsually yes, and it is one failure causing both symptoms. The starter stays locked out until the ISM confirms park or neutral.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat does \"Drive to workshop without changing gear\" actually mean?\u003c\/strong\u003e\u003cbr\u003eThe ISM has logged a fault and is telling you that once you stop or shut the car off, it may not be able to select a gear again. Do not ignore it. That message is your window to get the car somewhere convenient before it locks in park.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDo I get my own module back?\u003c\/strong\u003e\u003cbr\u003eNo. You get new hardware carrying your data. Your original stays with us.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWill I need the dealer or a scan tool afterward?\u003c\/strong\u003e\u003cbr\u003eNo. The unit ships with your VIN and your adaptation data already on it. Bolt it on and drive. The only exception is if your old module is too damaged to read, and in that case we handle the programming remotely with the dongle and your Android phone.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs it the ISM or the conductor plate?\u003c\/strong\u003e\u003cbr\u003eThe conductor plate causes shifting faults while driving, harsh engagement and gear specific problems. The ISM causes the car to not select a gear at all. If you cannot leave park and the stalk does nothing, that is the ISM.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I just buy a new one myself?\u003c\/strong\u003e\u003cbr\u003eNot easily. Mercedes will not sell an ISM to you or to your independent shop through normal parts channels, and a unit bought elsewhere still arrives blank. See the Theft Relevant Part section above.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan my local shop do the removal?\u003c\/strong\u003e\u003cbr\u003eYes, and they need no Mercedes specific tooling. It is three bolts and a connector. The specialized work happens on our bench.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDo I send my key?\u003c\/strong\u003e\u003cbr\u003eNo. Just the module. Never mail your key.\u003c\/p\u003e\n\u003cp\u003eIf you want a duplicate key done, that is another service and requires that you send the ignition switch to us. \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow long does it take?\u003c\/strong\u003e\u003cbr\u003e3 to 5 days on our end, plus transit each way.\u003c\/p\u003e\n\u003ch3\u003eStart it now\u003c\/h3\u003e\n\u003cp\u003eAdd to cart and we will email your packing slip. Pull the module this weekend, ship it Monday, and you are driving again instead of paying two thousand dollars and a tow truck.\u003c\/p\u003e\n\u003cp\u003eNot sure it is your problem? Send us a photo of your module label and whatever fault codes you have before you order. We will tell you honestly whether this is it, even if the answer costs us the sale.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eModule Medics.\u003c\/strong\u003e Mercedes module cloning and remote programming, Baltimore, Maryland.\u003c\/p\u003e","brand":"Module Medics","offers":[{"title":"Default Title","offer_id":44862853611609,"sku":null,"price":650.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0647\/0510\/1913\/files\/repair_service_ism_service_required_do_not_shift_gears.jpg?v=1788975165","url":"https:\/\/www.modulemedics.com\/products\/mercedes-ism-intelligent-servo-module-repair","provider":"Module Medics","version":"1.0","type":"link"}