W208 2000 clk320



My sons car is being towed home and I am sure it's the starter.
Full power to all systems but nothing when turning the key.
I was not able to find any youtube videos that could help











The starting system is part new school and part old school.
The new school involves the drive authorization system ( a.k.a DAS), which was implemented to prevent vehicle theft.
When you insert the keyfob into the ignition switch, an encrypted digital commutation occurs that unlocks the steering wheel.
If successful, you'll be able to turn the ignition switch to position 3, which should then start the vehicle.
If the vehicle does not start (i.e. crank), it's because after releasing the steering wheel lock, an additional encrypted digital commutation is sent to engine control module (i.e. ECU), which if successful, then powers the old school (a.k.a. traditional) starting system.
Since you indicted that you were able to fully turn the ignition switch to the start position, I was going to suggest the following, which would completely rule out a DAS malfunction.
Specifically, remove the starter motor starting relay, located in the drivers side fuse/relay box and then using a multimeter, verify that the ECU is property powering the motor starting relay (Note: the contacts for relay's coil are printed in the relay cover).
Thereafter, you're only dealing with basic old school technology, where a good shade tree DIYer should be able to troubleshoot and repair.



I once took my car to a specialist who deals with foreign cars and he was reading all the codes testing these testing that he thought it was the Sam. I was convinced it had something to do with the ABS because supposedly it was checked twice and rebuilt. I finally said to the mechanic listen let’s put a used ABS system in the car get something very close to the existing serial numbers and see what happens. Sure enough I was right this poor guy spent six hours three separate times totaling six hours all for nothing. I’m glad he didn’t charge me because I’m the one who actually figured out what the problem was I just had him program everything after.
Why am I talking about this to explain that I do know how to do diagnostics again it was my son‘s car he was 100 miles away so I was just telling him to do certain things just to make sure before he he told it all the way to my house which now we found out was for nothing . As far as for getting out the short it’s the trunk switch or the trunk motor. The car is rotting on the fenders it has 200,000 miles what did I do to fix it I just remove the bulb and that’s it we’re done
Last edited by karayjay; Jan 29, 2022 at 08:02 AM.



Are we 100% sure that it’s a starter? And not some electrical connection or something to that effect. are you gonna have to take the exhaust down but here’s a good video


