merc e300 immobiliser

markheaney2 · 13-07-2008, 10:15 AM

can anyone tell me how to bypass my immobiliser both lights flash on the mirror very fast i cannot get these to clear put new batteries in the key fob this is an old p reg e 300 diesel w210 it is a taxi we use we will be changing it soon so i dont need to spend any money on it please i need a quick fix

Dieselman · 13-07-2008, 11:38 AM

Doesn't flashing lights mean it needs the key resynchronising.?

Isn't the alarm module under the passenger footwell on these, not sure.

andy27168 · 13-07-2008, 02:58 PM

If you get any sort of response from the fob it won,t be synching it will need, on the 202 c class the alarm unit is in the passenger footwell (I think this is the same for a 210) where there is a fuse which can blow or crud up, do your indicators still flash? On a 202 there is a white relay in the boot which the alarm interfaces with to flash the indicators on arming/disarming.
Have you got any other L.E.D.s on the car these all have to work otherwise they can cause immobiliser problems.
Don,t just assume the batteries are ok because it still operates the C/L two separate systems and the immobiliser deactivation appears to be more voltage sensitive than the C/L.
Bypassing the immobiliser is possible via the control unit, but there is a different procedure with a diesel as the immobilser is done via a coded fuel valve apparently.

13-07-2008, 10:15 AM	#1
markheaney2 Member Join Date: Nov 2004 Location: chedworth near cheltenham Car: mercedes e250 diesel 1996 Posts: 72	merc e300 immobiliser can anyone tell me how to bypass my immobiliser both lights flash on the mirror very fast i cannot get these to clear put new batteries in the key fob this is an old p reg e 300 diesel w210 it is a taxi we use we will be changing it soon so i dont need to spend any money on it please i need a quick fix

13-07-2008, 02:58 PM	#3
andy27168 Hardcore MB Enthusiast Join Date: Nov 2004 Location: Southampton Car: W202 230K 97, C43 AMG 99. Posts: 1,205	If you get any sort of response from the fob it won,t be synching it will need, on the 202 c class the alarm unit is in the passenger footwell (I think this is the same for a 210) where there is a fuse which can blow or crud up, do your indicators still flash? On a 202 there is a white relay in the boot which the alarm interfaces with to flash the indicators on arming/disarming. Have you got any other L.E.D.s on the car these all have to work otherwise they can cause immobiliser problems. Don,t just assume the batteries are ok because it still operates the C/L two separate systems and the immobiliser deactivation appears to be more voltage sensitive than the C/L. Bypassing the immobiliser is possible via the control unit, but there is a different procedure with a diesel as the immobilser is done via a coded fuel valve apparently. __________________ Andy, Current,W202,grn/blk met 1997"P"C230K, Sport, manual ,135,000 miles,Lorinser/Bilstein shox, K&N, mirror indicators,Illuminated sills, MB Illuminated Mirror Sun Visors, auto dimming RVM. Also Current, W202,grn/blk met 1999"T"C43 AMG Sport, Parktronic,Retro fitted so far,W210 face lift folding,blinking&dimming mirrors, MB Illuminated Mirror Sun Visors, electric rear blind, auto dimming RVM, OEM colour coded door handles, headlamp wash/wipe, and OEM Zenons c/w levelling.

13-07-2008, 11:38 AM	#2
Dieselman Hardcore MB Enthusiast Join Date: Jul 2003 Posts: 19,310	Doesn't flashing lights mean it needs the key resynchronising.? Isn't the alarm module under the passenger footwell on these, not sure.

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