Which Mercedes-Benz vehicles have the Intelligent Servo Module (ISM)? Mercedes Intelligent Servo Module (ISM) was installed in 2005, and newer vehicles are equipped with the 7G Tronic Transmission (Code: 722.9) and gear selector mounted on the steering column, except for a few 2005 to 2007 models that still use the 5-speed 722.6 transmissions. Car. W212 e220. Hi. I have a strange issue with my 2014 w212 e220cdi gearbox. Please bear with me as I'll try to explain as best I can. Once I go for a drive everything is fine, lets me choose a gear and changes smooth enough and let's me choose between E, S and M modes and allows me to change gears manually with paddles behind steering wheel. While these are the typical symptoms of a failed valve body or conductor plate, Mercedes-Benz transmission can go into LIMP MODE due to other issues that may not be directly related to the transmission. These transmission problems may start developing as early as 50,000 miles. Replacing the valve body will cost between $2,000 and $3,000. E350 CDI Estate (W212) 2010. May 15, 2017. #1. Hi, My E350 CDI Sport Estate (W212) first registered March 2010 has developed two distinct noises which appear to be coming from somewhere in the drive train. One is a 'howling / whine' the other a slightly higher pitched ringing/whirring sound. The car has done 48k miles, 28k in my ownership and I have a 2013 w212 with the 7gtronic plus gearbox and when cold, the shifts are quite notchy especially into 3rd gear and occasionally 2nd. I got the gearbox serviced at a merc specialist for ~£280 all in. It took 5 litres of oil had the sump gasket and filter changed. HOW TO FIX MERCEDES TRANSMISSION THAT DOES NOT SHIFT LIMP MODE Check Out Our Website: http://mechaniclifestyle.comHey guys, if you have a Mercedes Vehicle i Bring the vehicle to a complete stop on level ground. Press the parking brake button on the side of the steering wheel. Open the driver’s door, remain in the vehicle, and press the brake pedal. Move the gear selector stack to neutral by pressing it up or down. Disconnect both auxiliary and car batteries. Avantgarde Automotive, Mercedes-Benz and SLR McLaren specialists. Service, repairs, diagnosis and motorsport preparation. Unit 14 Hither Green Trading Estate, Clevedon, Somerset, BS21 6XU Tel: 01275 217270 Email: steve@avantgarde-automotive.co.uk. www.avantgarde-automotive.co.uk. Hi All, Strange issue that my 2012 C Class (58k miles) has bjLTR7.