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Discussion Starter #1
hi everyone,

my car is siting in the driveway and the alarm sounds, i use the keyfab and it stops. then i notice the tow away button red light is on solid. then about 10 min later the alarm sounds again? i cant turn off the solid red light on the tow away button and alarm keeps going off every 10min. so i pull the batterycable and call it a night:confused: any ideas what why:hail:
 

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aka John
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hi everyone,

my car is siting in the driveway and the alarm sounds, i use the keyfab and it stops. then i notice the tow away button red light is on solid. then about 10 min later the alarm sounds again? i cant turn off the solid red light on the tow away button and alarm keeps going off every 10min. so i pull the batterycable and call it a night:confused: any ideas what why:hail:

If it was an R171, I'd say check the tow sensor in the rear electronics panel. I'm assuming the R170 has one as well, but don't know enough about it to tell you where it is.. :(
 

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Discussion Starter #3
If it was an R171, I'd say check the tow sensor in the rear electronics panel. I'm assuming the R170 has one as well, but don't know enough about it to tell you where it is.. :(

Thanks its an R170 SLK 320 2001 weather has been damp raining past few days i am hearing about something in the trunk near the spare tire gets damp?
 

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you thinking pse but do this first. under the front engine cowl is the siren. it has a sep. battery. check it and replace if bad. this will set the alarm off when the battery goes bad
 

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Discussion Starter #5
you thinking pse but do this first. under the front engine cowl is the siren. it has a sep. battery. check it and replace if bad. this will set the alarm off when the battery goes bad

will check it but what about the tow alarm light lit solid red and wont go out could the battery also cause this?
 

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Discussion Starter #6
think i just opened a can of worms

will check it but what about the tow alarm light lit solid red and wont go out could the battery also cause this?

so i opened the trunk and found the PSE pulled it from that foam cover and found a few drops of water not sure where it came from. left it out of the foam and just sitting in the trunk till i make sure its dry.

i tried to get to the alarm horn but cant get windshied wipers off??? screw cam off but they dont budge??? i assume you need to take them off to get to the horn to replace battery? gave up on that till get further info put it all together again except for the pse just sitting in trunk for now.

hook up car battery again after removing it to shut up the alarm and now the tow alarm red solid light is off but now i am getting a ESP/BAS error light in the dash and esp bypass wont do anything:confused:

also my stock radio was asking me for a code and i got car used and have no idea what code is? so i entered 1111 and now it just says wait:soap:
so like i said i just opened a can of worms think its time to take it in to mechanic not sure what else i can screw up:soap:
 

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Founding Member #2 2008 SLK55 AMG
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IIRC on the R170 radio (from reading prior posts) may take some time before it is accepted (up to 1 hour, may be even longer).
 
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so i opened the trunk and found the PSE pulled it from that foam cover and found a few drops of water not sure where it came from. left it out of the foam and just sitting in the trunk till i make sure its dry.

i tried to get to the alarm horn but cant get windshied wipers off??? screw cam off but they dont budge??? i assume you need to take them off to get to the horn to replace battery? gave up on that till get further info put it all together again except for the pse just sitting in trunk for now.

hook up car battery again after removing it to shut up the alarm and now the tow alarm red solid light is off but now i am getting a ESP/BAS error light in the dash and esp bypass wont do anything:confused:

also my stock radio was asking me for a code and i got car used and have no idea what code is? so i entered 1111 and now it just says wait:soap:
so like i said i just opened a can of worms think its time to take it in to mechanic not sure what else i can screw up:soap:
relax bro!!
you will need a tool to properly remove the wipers. no big deal. any auto parts house
bas/esp lite . eazy peazy! turn the steering wheel lock to lock left then right then back to center. lite goes out.
radio code. bigger problem. if you dont have the code you have to go to the dealer with the vin to get it. the wait signal will go out after 20 mins. then enter the proper code and set it.

if you have the owners manual and case there should be a card in the face of the booklet holder (like a credit card) with the radio code. its a 5 digit code
 

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Discussion Starter #9
relax bro!!
you will need a tool to properly remove the wipers. no big deal. any auto parts house
bas/esp lite . eazy peazy! turn the steering wheel lock to lock left then right then back to center. lite goes out.
radio code. bigger problem. if you dont have the code you have to go to the dealer with the vin to get it. the wait signal will go out after 20 mins. then enter the proper code and set it.

if you have the owners manual and case there should be a card in the face of the booklet holder (like a credit card) with the radio code. its a 5 digit code
Thanks you have been such a huge help:rb
i will try the steering trick tomarrow to remove the error light. what is the wiper removal tool called, is it called a wiper removal tool:confused: as for the radio i have almost everything except that code card i did find a dealers card with some numbers written on back, no i couldnt be that lucky anyway would have run into these things sooner than later :tu:

I guess its all about getting to know my car better,sorry for all the basic questions but when it comes to working on cars im not the sharpest tool in the shed:rockon:
 

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Discussion Starter #10
Update:

just did the turning wheel left to right worked! Now ESP is back to normal. I lucked out with the radio number on back of dealers business card was the magic number radio is back. Still have the solid red light on the tow alarm? If I replace battery in horn near wipers will this solve alarm problem? For now till I get a chance to pull off wipers will try locking the car and not setting alarm to avoid going off every 10 min

thanks for all the help!
 

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Discussion Starter #12
you may need to go for a drive to reset the tow alarm. just a thought
Thanks! Yesterday car sits all day locked manualu no alarm set, at 7pm alarm goes off again? Disconnected battery to **** it up.

Went to Keagan auto parts to look for a wiper blade remover and they have no idea what one is,and I'm not sure what tool to remove wipers to replace battery in horn?

Thanks again
 

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Went to Keagan auto parts to look for a wiper blade remover and they have no idea what one is,and I'm not sure what tool to remove wipers to replace battery in horn?
You shouldn't need a tool (other than a spanner to undo the nuts )to remove the wipers ,they should come off by wiggling them about .If they're really tight maybe a small gear puller is what you need .
 

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Discussion Starter #14
Update :

so I found the wiper pulled me and good ol wd40 what a pain in the a-- got one off that way the other I used a puller borrowed from my dad. I went to mechanic and tol him about the alarm and he pointed me in the same direction the horn as the culprit. So after pulling out the horn not sure if it's worth putting back?

You need a tiny tool to take the horn apart I don't have what kind of battery is it a weird obscure german one?

Again thanks

the tow alarm red light was out I drove the car all seemed good after pulling the horn it's back on solid?
 

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These look like 6 x 1.2 Volts, Nickel Metal Hydride (NiMH) rechargeable batteries, soldered together to give the 7.2V. Don't know if it's possible to get a similar assembled battery, or you would have to buy the batteries and solder them. You would probably have to cut the wrapper to be able to see what's inside!
 

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You can find the Varta cells that went to make up the battery HERE - have a 'root through' to get the correct size, then get the part no. and do a search for suppliers in the US.
 
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