emin.mak

My 07 S500 now has 57,000 miles, While driving at a constant speed and then I brake and immediately accelerate, I notice that the car seems stuck in a high gear 3rd or 4th depends on the speed I was driving at the time of breaking. When I step on the gas, the car revs up to 2-4k rpm, however, barely moves. Feels like when you are driving manual transmission starting from 3rd gear or perhaps 4th gear. When I pull over and park the car, turn it off the engine, wait for a min or so and then restart the car then the problem seems to go away. After reading few post I think this is one of 2 issues; 1. reprogramming 7g transmission or the valve body/control unit (part 2202703206-88). When technician plugged my car into his computer the only (F) I see is the speed sensor. I went to few shops and one recommends changing whole transmission (seems hard to believe) and the other shop thinks it’s the Valve Body. I just scheduled the appt with the local dealer and for $180 have them diagnoses the issues but I think they will also recommend new transmission because it’s the for sure solution and most lucrative to dealer expensive one to me!

Any recommendations much appreciated

Chucky300

Valve Body Busted or Stuck.

Check the W221 topic threads - a lot of problems with Trannys...

cool_lagoon

its called sliding clutch, have the fluid level
check first

NuMBS500er

I had the similar problem once, but dealer can't seems to duplicate the problem, and the problem has not repeat itself since.

rogersdba

I had the same issue with my cl550 Electrohydraulic Control Unit went bad. My car has been pretty reliable. But this issue really pissed me off. Becuse MB knOw it's problem and still won't fix it for free. I has to use my aftermarket car warranty.

cool_lagoon

MB is one of the worst car manufacturing warranties and recall program, they'd rather have the consumer pay for their recalls (lemon), that's why we the dealership overseas are making a kill in profit. In spite of that MB is still beautiful in each of it's new invention and creation. Most individuals don;t really mind the spending but still i do believe some one from the regulating body like the National Highway Safety Board and the consumer group should take a more active role in making MB responsible for their engineering and manufacturing glitch
.

brownbomber

If you are like most people that run into this problem, you're right outside of your Manufacturers warranty. Make sure that you have an extended warranty because it will only get worse from this point forward.

Sorry! Make sure that you have an extended Warranty (AGAIN)