RNajarian

Here is the Back Story

Recently I had a pretty scary blow out in my 2007 CLK 350

Right rear tire had a nail in it and exploded on the freeway going about 75

Fortunately I was able to pull over before I destroyed the rim. My car did not come with the Tire Pressure Monitoring System.

I had already installed the valve stem LED tire pressure warning lights on each tire (For those of you that are not familiar with this system, they are about 1 1/2 cm tall and 1 1/2 in diameter and they screw onto the valve stem of your tire and a LED will flash yellow or red when tire pressures are low -depending on pressure value) It is easy to check the tire pressures are correct as you enter the car by just glancing at the tires. ~20 off Amazon, batteries are good for 1 - 1 1/2 years.

When I left my office the pressure of the tires were all within normal limits, so I ran over the nail after leaving.

My E350 and my Cayenne both have a dedicated Tire Pressure Monitoring System, which have sufficiently warned me in advance of low tire pressures,

My Project

I have been looking to retrofit my car with the Run Flat System (which was an option in the MY 2007 CLK), Before hooking the car up to a SDS I wanted to see the options in the Engineering Mode. My research shows me that the warning system is based on the tire rotation not the actual pressure -so the TPMS sensors and receivers may not be required. So I am hoping all I will have to do is active the Run Flat System, calibrate the tire rotation and the system will be active.

Of course if I am mistaken of how the Run Flat System works I would LOVE to be educated. If I am right, I think this hack would be appreciated by the W209 community.

SO

How do you enter the engineering mode of a MY 2007 CLK. (Yes I have used the search feature and have not found a thread that works.) I should also note I have updated the COMMAND system to the latest MB Update.

Thanks for your Insight

Rudeney

I've looked into this, and I don't believe you need "engineering" or "development" mode of SDS. I am fairly certain you can enable TPMS via standard coding of the ESP module.

RNajarian

Thanks Rudeney

I'll research the ESP Module coding and hopefully come back with some good news.

quentinr1

INSTRUCTIONS
1.
Press the audio button to get into audio mode.
2.
To access the engineering mode
Press and hold the circled button (mute) in the bottom left
Press and hold the circled button (phone) in the bottom right
Press and hold the circled button (serv) in the top left

Simultaneously hold all 3 buttons for about 45 seconds until you
get a message on the screen which says "Welcome to
Engineering Mode".
3.
To enter the secret menu
Press and hold the "*" star key
Press and hold the "#" hash key
Press and hold the "<" arrow left key

Simultaneously hold all 3 buttons as indicated above -

To access the video in motion menu press the button next to
Dr.Dist.
Using the arrow keys deactivate all of settings with the OK button.

Press the back button to get back to the main menu.

To access the MP3 enabling menu press the button next to
Backd.

Using the arrow keys, highlight the MP3 feature and enable it
using the OK button.
Now go back to the main menu using the back button.

To access the DVD region menu, press the button next to regcod.

Using the arrow keys, highlight the region free setting and enable it
using the OK button.
To activate the settings press back then end and switch the
command console off then back on again.
All setting may be activated and de-activated as many times as
you want.

RNajarian

Thanks guys

If anything positive happens I'll post updates

thrilos81

This sequence doesn't seem to work. On the US w209 which would be the left arrow key?
You can enter the "Alpine Test Mode" by holding ok+7+mute, but there are no settings that can be changed in there other than performing some diagnostic tests.
Am I missing something?